How To Germinate Marijuana Seeds For Hydro

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Follow these steps to start weed seeds for hydroponics and get your plants off to a healthy start. Fail-Proof Guide to Germinating Seeds in Hydroponics Plus, How to Care for Hydroponic Seedlings… We have a cannabis seedling germination page which has everything you need to know about all Everything you need to know how to quickly and successfully germinate cannabis seeds. Compare different methods of marijuana seeds germination and choose the best one

How to Start Weed Seeds for Hydroponics

Now that it’s legal to grow your own weed in dozens of states, many people are moving to hydroponics for their seed growth.

There are various benefits to this form of seed germination, but the process has to be done correctly in order to get your cannabis seedlings to form healthily. If you put the time and effort in at the beginning, you’ll create a hydroponic system that does most of the work for you later.

Creating Cannabis Plants From a Hydroponic System

Sure, it’s easier to buy an already germinated seed rather than taking the time to do it yourself.

But the costs add up quickly, whereas germinating cannabis seeds hydroponically yourself gives you a solid return on your investment.

Rather than buying sprouted seeds and adding them to your water system, you can have a successful germination rate. This process also takes away all the disadvantages of the seeds you get in the store.

Why You Need Hydroponics in Your Life if You Grow Cannabis

If you don’t want your cannabis seeds limited to what other people sell, growing seeds is the way to go.

Plus, you can avoid the concern of picking up diseases from store-bought marijuana seeds and spreading them to your young plants.

Once you get the hang of how to germinate cannabis seeds and tend to your hydroponic system, you’ll never want to grow seeds through any other growing medium.

Turning Quality Seeds Into Cannabis Plants

Because the root system in hydroponics never connects to the soil, any seeds sprouted stay safely floating until you’re ready to use your marijuana plants.

So, any sprouts emerging from your system stay healthy and untraumatized.

How do you take a few seeds to germinate, design a hydroponic system, and start growing marijuana yourself?

Here’s all you need to know about germinating cannabis seeds for the maximum yield possible.

Starting Your Hydroponic System

Ready to see how good it feels to watch your cannabis seeds germinate into a young plant?

Sprouting seeds is a simple way to increase your healthy plant yield. You end up with multiple cannabis plants rather than one healthy seed bought from a store.

To ensure you germinate seeds that can successfully grow into a cannabis plant, you need a hydroponic system.

It doesn’t have to be fancy, but the costs at the start will be more expensive than buying a sprouted seed.

Remember, though, that getting a few seeds over time will end up costing more than investing in and creating your own method of germinating seeds at home.

What Every Cannabis Seed System Needs

In a cannabis plant’s life, there are four main components.

As long as you learn these factors and use them in an organized manner, you won’t have to add too much more equipment or do a lot of work after the initial setup.

Germinated seeds in hydroponics don’t need soil growers like your average growing plants do when you use potting soil.

Instead, they just require the essentials: oxygen, water, a light source, and heat. As you start seeds in the system, the proper lighting and the right temperature are crucial.

A Simple Beginning that Anyone Can Do

Let’s begin the process of designing your first greenhouse hydroponic system starting small.

You’ll need a grow tray, some starter cubes, and a humidity dome to monitor the temperature and moisture levels.

Starter cubes aren’t necessary, but they do make a massive difference. They have the ideal nutrient solution, like peat pellets, to help those first seeds sprout.

Once the young seedling reaches the stage where it’s able to be transferred, you can easily move the planted cubes without disrupting the roots.

This helps prevent root rot from excess water and gives you the maximum yield possible.

Adjusting the Temperature

Within the dome, your grow tray helps your plants grow from feminized seeds into healthy cannabis plants ready for the flowering stage.

For your role, you have to monitor the temperature and humidity. If you see water dripping from the side of the starter cube or dome, there’s too much moisture.

A heating mat under the grow tray helps avoid cold temperatures messing with the starter cubes and the seedlings.

Because even warm water turns cold, this heating mat keeps the grow tray at the ideal temperature to nestle the seeds inside and encourage them to grow.

Finding the Right Light Source

When it comes to adding lighting in the room, you don’t necessarily need more light. You need something that the germinating seeds grow toward.

In the case of cannabis plants, many experts recommend a hydroponic LED grow light system.

Cannabis is a green plant, so it must have the ideal environment to encourage photosynthesis. Seeds sprout naturally when the lighting initiates this process.

Then, the plants capture the light and use it to change the water and the given nutrient solution into oxygen and the compounds you desire.

These little seedlings need intense light, which is found in an LED grow lighting system.

Enough light at the right intensity will ensure you get the maximum yield possible from younger and older seeds.

Sprouting Your Seeds

Now that your environment is set up, it’s time to start the process of germination!

First, take your starter cubes and let them soak in clean tap water. In an hour or so, take two or three seeds and add them to the cube.

You should use enough to ensure at least one germinates, but not so many that if they all do, they’ll be overcrowded. As they begin to grow, any plants that look like they aren’t as healthy as the others can be thinned out.

Move the Starter Cubes

Next, take your grow tray and add an inch of half-strength nutrient solution.

Place the lighting source and mat where they fit best, then add the dome to keep the temperature and moisture at optimal levels.

Add your starter cubes into the tray, add a little water (not too much, you want to avoid root rot), and that’s it!

It will take a few days for seeds to germinate, but you’ll see whether your system is working or not by the fourth day.

Get Ready to Transport!

The seeds are germinating, and you can see roots daintily hanging out of the cube’s bottom. It’s the moment you’ve anticipated since you started your basic hydroponic system.

It’s time to transplant your young plant!

Chances are, it’s only been a month or less, but it can feel like forever as you’re checking and double-checking the plant’s health.

Now, it’s the real thing, and you’re moving your seedling into your actual hydroponic area.

This is the bigger tank or pond where you’re going to hold your nutrient solution and let your plants thrive until you’re ready to cultivate them.

Gently Move the Cube

Once you have a place for the cube, use the paper towel method to hold under the roots as you gently pull it from its grow tray.

There isn’t anything that connects the roots to a soil system, so a wet paper towel is all you need.

The roots are going to need a little time to get used to their new environment.

While they try to absorb the system’s nutrients, you can add a little water to the top or use those wet paper towels to cover the cube.

As the paper towel dries out, you know it’s time to add a little more moisture. Within a day or two, your new seedlings should be enjoying their hydro system without help, and you can drop the paper towels.

Enjoy Your Hard Work

You’ve taken your cannabis from small, non-germinated seeds to a young, healthy, green plant. From there, you guided it and monitored its growth as it flowered.

Now, it’s time to cultivate the good parts and turn the leftover cuttings into more cannabis seeds.

The return on your investment starts now. Rather than heading back to the store to find more cannabis seeds to germinate, you have everything you need to repeat the process.

Your grow tray is ready to house some more starter cubes. Your light source is still intensely shooting out waves of photosynthesis-inducing light, and your humidity dome is set at the ideal temperature and moisture.

Go ahead and take those new seedlings from the plant you nurtured and turn them into new young plants. You’ll never have to buy your cannabis stash again!

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Fail-Proof Guide to Germinating Seeds in Hydroponics
Plus, How to Care for Hydroponic Seedlings…

We have a cannabis seedling germination page which has everything you need to know about all the different germination methods, but this tutorial is different. In this hydroponic seedling tutorial I’m going to share exactly how I do my seeds from beginning to end in a DWC/bubbleponics setup!

Just follow these instructions and you’ll end up with healthy, fast-growing plants that germinate in just a few days. It’s pretty much fail proof!

Learn How to Start Seedlings So You Can Grow Hydroponic Cannabis Plants Like This!

Supplies Needed

1.) Get Cannabis Seeds

There are a few different ways to get cannabis seeds, with the most common being ordering seeds online and growing seeds you find in weed that you buy. Learn how to research and find the right strain.

Here’s a picture showing several healthy and viable cannabis seeds

2.) Germination for Hydroponics

I’ve tried a bunch of different germination methods over the years, and the technique I prefer is for hydroponics is starting with the “Paper towel method” to germinate, putting the germinated seeds into Rapid Rooters, and installing the Rapid Rooters directly into reservoir. Lots of other germination methods as well, but this has worked best for me!

Paper Towel Method

This method is hard to mess up if you follow the instructions!

  1. Place your seeds inside a folded wet paper towel, and place it between two paper plates (or regular plates) so that they don’t dry out.
  2. Check on your seeds every 12 hours but try not to disturb them. When they’ve germinated, you’ll see the seeds have cracked and there are little white roots coming out.
  3. They should germinate in 1-4 days, though some seeds can take a week or longer (especially older seeds).
  4. Keep them warm if possible. One thing you can do to get seeds to germinate a little faster is to keep them in a warm place (75-80°F). Some people use a seedling heat mat but in most cases that’s unnecessary.

These seedlings were sprouted using the paper towel method!

3.) Place Germinated Seed in a Rapid Rooter

The Rapid Rooter should be cut open lengthwise

Gently place the germinated seed inside, root down

Most seedling plugs will go back into place easily, and you’ll barely be able to tell it’s been opened

4.) Prepare Hydro System for Its New Guest

If you haven’t put your hydroponic system together yet, now is the time! Make sure your pumps are all running, and that you’ve made a reservoir with seedling-strength nutrients. You need a home to put your new plants!

See also  Weed Seeds For Indoor Growing

Hydro Tips & Hints

  • Air bubbles – have lots and lots of bubbles in your water reservoir. That means your air pump needs to be on all the time for the full grow. The main benefit of hydro is your plant roots are getting an unlimited amount of both water and oxygen. This is achieved by dissolving a lot of air into the water via an air stone and air pump. In order to get the fast growth, you want a lot of bubbles! A highly-oxygenated tank is also far less likely to get root rot, or suffer from other unwanted organisms growing in the reservoir! – This supplement contains a specific bacteria that was first found in rice paddies in Japan in the 40s! It’s been common in Asia for years but only in the last several years has it been available in the US from a company called Botanicare. I highly recommend, even insist, that all hydro growers get this cheap-but-effective supplement to keep plant roots healthy!
  • Add seedling level nutrients from the beginning. A lot of growers, especially soil growers, will tell you not to add any nutrients for the first few weeks of the plant’s life. That makes a lot of sense in soil, because there are lots of nutrients contained in the soil itself for your young cannabis seedling, and giving more right at the beginning can end up giving way too much for such a young plant. However, in hydro, the only nutrients your seedling gets is what’s in the water, plus what little was contained in the seed itself. Because of that, I highly recommend giving seedling-strength nutrients to your plants from when you first fill your reservoir. Seedlings grow a LOT faster with light levels of nutrients than if you only give plain, pH’ed water at first. from the beginning of your plant’s life to end the of your plant’s life

5.) Install Rapid Rooter and water the seedlings until roots reach the water reservoir – Turn on light to keep seedlings warm for best results!

Make sure to always keep the Rapid Rooter moist but not soaking wet.

If you have a top-feed, place the tube near the bottom of the net pot so the water isn’t soaking the seedling’s roots. You just want water dripping out the bottom so the root can use it for oxygen and water until it’s fully established in the reservoir.

Add your Rapid Rooter(s), and fill around the edges with extra clay pellets to hold each one in place.

Since your seed has already sprouted and been in placed into the right growing position, it’ll often pop its head out within just 12-24 hours! Sometimes you see just the leaves, but occasionally you actually see the seedling push the shell above ground. I keep the grow light on even before the seedling appears. It helps keep it warm and guide it toward the light.

When this happens the shell usually falls off on its own as the seedling grows!

The Rapid Rooter in this picture is a little too wet, which makes the seedling prone to “damping off.” If you ever notice the Rapid Rooter actually looks wet or shiny, it’s too much water. Try turning the top-feed off every few hours, or hand-watering the seedling at first. Too much moisture can kill!

Don’t use a humidity dome on seedlings unless it’s very dry where you live. If you do use a dome, consider keeping a vent open and watching the humidity. A young seedling doesn’t require high humidity, and they tend to get “wet feet” and stop growing in constantly wet conditions.

Now that your seedling in in the tank, it’s time to learn how to….

6.) Take Care of Hydro Seedlings

Here are tips for taking the best care of hydroponic marijuana seedlings:

  • Leave roots alone as much as you can with young seedlings in a hydroponic setup. It takes them a little while to get all established in the tank, almost like a fish, and during that time seedlings are much more sensitive to their roots being touched or being moved around. If at all possible, try to let the seedling grow in the same place without being moved for at least a few weeks until you put them in their final home, or even just start them in their final home!
  • Avoid reservoir changes for a few weeks if you can – Going along with what I said before about leaving the roots alone, I’ve found that young seedlings often don’t respond well to reservoir changes. Instead of changing the reservoir, just top off with half-strength vegetative nutrient water until the plant is at least 3 weeks old. It won’t be using enough nutrients to mess with the ratios, and as long as you maintain the pH and use Hydroguard your young plant will be fine with being topped off.
  • Check the pH dailyto prevent nutrient deficiencies
  • Warm but not hot temperature– I recommend hydro growers aim for 75°F, and try to stay between 73-80°F.

These seedlings are a few weeks old, and the grower plans to move them all to the

This is a time-lapse video of a cannabis seedling sprouting and growing over 13 days.

Cannabis seedlings just getting their bearings – try to avoid moving or disturbing them until they are growing fast, with new leaves every day!

Big cannabis plants ready to switch to the flowering stage

I thought hydro plants liked it cold?

Just like in soil, cannabis plants in hydro tend to grow faster in relatively warm temperatures. This is a somewhat controversial statement because a lot of hydro growers prefer to keep their temperature lower in the grow space to help prevent root rot. In fact, there are some growers right now who are reading this and shaking their heads at me.

There’s good reason to believe that hydro plants would grow better with a cool reservoir. For example, the bad microorganisms that make root rot don’t survive well at lower temperatures. Additionally, water can physically hold more oxygen at lower temperatures, which seems like it would be great for faster plant growth. Because of this, lots of growers will AC their room to 60°F, and/or get a water chiller to cool their water reservoir to a similar temperature.

I do agree that if the temperature is above 80°F, your plant is a lot more likely to get root rot. However, I personally have not found that cool temperatures are adequate to prevent root rot. Even if the temperature is 60°F, you still need lots of bubbles and a “good bacteria” supplement like Hydroguard to prevent root rot in many cases.

I’ve seen several growers buy a water chiller and still get root rot. So I personally don’t believe cold temperatures are the best way to go to keep roots healthy.

The other reason I recommend to keep it warmer is because the plants just grow faster around 75°F in hydro. If your roots go from 60°F to 75°F, you’ll see the plants start growing faster in just a day or two, just like how plants in soil grow faster when it’s warm!

Just like in soil or coco, cannabis plants in hydro grow fastest when it’s a little warm, around 75°F!

Although there may be more oxygen dissolved in the water at lower temperatures, at least in my grow tent that apparently isn’t the limiting factor to growth, because plant growth speeds up at warmer temperatures.

I’ve found that if the grow space feels cool to you, it also feels cool to your plant most likely, and it may not be growing to its full potential. Some Sativa strains are particularly sensitive to the cold, though some Indica strains from cold climates will still thrive at lower temps.
Autopsy: Why Aren’t My Seeds Sprouting?

If your seeds still aren’t sprouting and growing properly, consider the following factors.

If there’s no germination at all…

  • Temperature may be too hot or cold – aim for 75-80°F
  • Too wet – seeds and seedling roots should always be moist, but should not stay wet
  • Too dry – if a root dries out the seedling can die!
  • Bad seeds – It might not be you, it could be the seeds themselves! How can I tell if seeds are viable?

If seeds sprout, but then stop growing…

  • Temperature is too hot or cold – aim for 73-78°F
  • Too wet – even though your plants are growing with root directly in water, new seedlings don’t like “wet feet”. They don’t like for it to be too wet near the seed for too long, so make sure your Rapid Rooter or growing medium nevers looks shiny or muddy, as that means there’s too much water! Young roots that stay too wet for too long start to get mushy and die. For this reason, it’s also usually recommended to avoid using a humidity dome with seedlings unless your air is dry. Although clones love humidity domes (they need water from the air because they don’t have any roots to get water), seedlings like it a little more dry or roots tend to get mushy.
  • Too dry – less common unless you live in a very dry area, but sometimes your medium dries out too fast if you’ve got a heavy-drinking, fast-growing seedling!
  • Too much light – if the seedlings get blasted with high levels of light right away, it can shock them. They may need some time to adjust to higher light levels. Simply starting your grow light a little further away that normal is usually enough.Think sunny window at first, and start ramping up after a week of healthy growth.
  • Not enough light – if seedlings are growing long and stretchy without growing new sets of leaves, it means it wants more light.
  • No light for more than a day – if the sprouted seed doesn’t get light within 24 hours after sprouting, it may die. Once seeds are sprouted, get them in a Rapid Rooter and under at least some amount of light as soon as possible!
  • Roots damaged – If somehow your roots got damaged, it can sometimes stop the seedling from growing

Unfortunately sometimes you will never know why certain seeds just don’t thrive! It’s all part of nature

How To Quickly And Successfully Germinate Cannabis Seeds

All cannabis plants, whether tall and lanky Sativa trees or compact and sturdy Indica bushes, start from a single weed seed. This tiny brown nut contains everything necessary to eventually yield hundreds or even thousands of grams of potent buds! However, to reach that point, it’s important to place the seed in a special environment that will trigger life inside it, crack the shell open, and let the roots and stalk out.

In this article, we’ll be explaining how to germinate cannabis seeds and tell you about the best ways to do it. Before we start though, it’s important to know what environment cannabis seeds are most likely to pop in. Since in nature, they germinate in spring, logically, you want to put them in conditions that mimic fertile ground in spring – think plenty of moisture, little light, and mildly warm temperatures of around 18-22 C (64-71 F). Now, you’re ready to learn about the best ways to germinate cannabis seeds. Let’s dive right in!

Main Methods Of Cannabis Seed Germination

The following three methods have proved to be some of the easiest as well as the most effective. This means each of them is a great way to help your cannabis seed to sprout.

See also  Growing Weed From Seed

Germinating Cannabis Seeds In Soil

When spread naturally, marijuana seeds germinate directly in soil. So, why not recreate the natural process? This method is great for beginners because of how few steps it requires. All you need to do is make a 1.5-2cm (0.5-1 inch)-deep hole in the soil, place your seed in it, and lightly cover it with more soil. Then, water the spot above the seed and keep an eye on it to make sure the area stays moist most of the time. It’s also a good idea to cover your starting pot loosely with a plastic bag or a wrap to keep the environment humid and warm until the seedling shows up from the soil. This method is preferred by many because it eliminates the stress of transplantation that, at times, can be too tough on fragile seedlings.

Cannabis Strains For Beginners

Germinating Weed Seeds In Water

If you’re not ready to get your hands dirty just yet, it’s fine! Some growers start their seeds in a glass of water. This method is easy and quite effective. Practice shows that germinating in water normally makes around 90% of weed seeds pop. This method is pretty self-explanatory – all you need to do is place your cannabis seeds in a glass of fresh water away from light. Usually, the nuts crack open on the second day. For older seeds, however, the process may take up to 7 days, which is also fine. After the taproot shows, the seed is ready to be planted. Some growers wait for the seeds to drown (about 24 hours in), then transfer them to a wet paper towel – the method we’ll be explaining next.

How To Germinate Marijuana Seeds In A Paper Towel

This next method is a true classic that’s been shared grower to grower for generations. It’s also pretty simple and has everything you need to maintain the perfect environment for cannabis seeds to pop. To use this method of germination, place your seeds on a clean paper towel, fold it over them, and spray the towel lightly with water. After that, put the moist towel on one plate and cover it with a second plate to keep the seeds in the dark and not let the moisture evaporate. That’s pretty much it! This method can also be modified and improved upon. For example, instead of a paper towel, you can use two cotton pads for each of the seeds – these will be easier to open when it comes to removing the seed. Instead of plates, you can also place your seeds in an airtight container or ziplock bag to ensure the moisture stays in the towel/cotton pads.

Easy-To-Grow Cannabis Strains

How To Germinate Cannabis Seeds In Cotton Wool

Start with making a layer of cotton wool moist but not dripping wet, so that the excess water won’t suffocate the seeds. Then place your seeds on top, cover them with another layer (also moist), and put everything in a dark place.

Make sure the cotton wool is covered and won’t dry out while the seeds germinate.

The difficulty with germinating cannabis seeds in cotton wool is that the emerging roots may get entangled in it. For this reason, it’s better to use cotton pads in which cotton is more compacted and there is less fiber sticking out.

How To Germinate Autoflower Seeds

Cannabis is cannabis, and germinating autoflower seeds is exactly the same as any other variety. Just make sure to use the most effective technique because with autos you don’t want to lose any time at any stage, including germination.

Also, autoflower growers often choose the straight-into-the-final-pot method of germination to spare their precious babies any shock of transplanting.

Alternative Methods Of Cannabis Seeds’ Germination

Now let’s move to the more modern methods of cannabis seeds germination. These aren’t necessarily better in terms of germination rate, but still have some pros as well as cons that we find important to explain.

Germinating Cannabis Seeds In Peat Pellets Or Starter Cubes

If you want to give your seeds special treatment and make them feel loved from the very first day in your grow op, you might want to get your hands on peat pellets or starter cubes. So, how do you germinate marijuana seeds in rapid rooters, peat pellets, and starter cubes? These are all individual plugs of peat or a special seed starter mix that are incredibly easy to use and don’t leave much room for error. In the case of peat pellets (you may also know them as jiffy pellets), all you need to do is soak them in warm water, which will make the pellets expand. Then, squeeze the excess moisture out and place your seed (pointy side down) inside the pellet. Starter cubes and rapid rooters don’t require squeezing, but whatever you choose, you need to make sure your medium is slightly moist at all times. One of the greatest advantages of this method is that the seed germinates in complete peace and doesn’t need to be transferred from the pellet/starter cube/rapid rooter. After the seedling is out, just plant it into the soil together with what you were germinating the seed in.

Fast Flowering Cannabis Seeds

If you’re wondering how to germinate marijuana seeds for hydroponics, peat pellets, unlike other methods from this article, aren’t suitable for hydroponic setups. However, the rest of the techniques we’ll be discussing can be used for both soil and soilless media.

Germinating Cannabis Seeds In Rockwool Cubes

If you’re growing your seeds in a hydroponic setup, you might want to look into rockwool cubes for germination. As a material, rockwool is inert, cheap, and easy to find. Fans of hydroponic grows often choose rockwool for its mold-resistant qualities. The process of germination in rockwool cubes is the same as described in the previous method: simply place a seed inside a cube, water it, and keep it moist until the seedling is out.

Even though many growers prefer using rockwool for germination of their cannabis seeds, this method has quite a few drawbacks. First of all, the pH of new rockwool is not suited for cannabis seeds. It’s far too high and needs to be lowered before use. That’s why rockwool requires soaking overnight in pH-ed water and properly rinsed afterward. The second drawback of using rockwool for germination is that it’s a synthetic material that’s bad for both your health and the environment. When working with rockwool, it’s advised to use gloves and protective masks, because little pieces of the material can easily get into your mouth, eyes, and even end up in your lungs. Lastly, germination rates for seeds placed in rockwool cubes aren’t that great either – you can wait for your seeds to pop for weeks without any result.

Cannabis seed germination methods comparison table

In this article, we’ve covered five main germination methods. To sum everything up, here’s a comparison chart that can help you decide on how to germinate your marijuana seeds.

How To Germinate Cannabis Seeds For Hydroponics

DWC systems have seen a huge rise in popularity among home growers, making the question of germinating cannabis seeds for hydroponics extremely relevant. Is it any different? Not really, because the basics stay the same. You can still start with the paper towel method or a glass of water. However, we suggest using either starter cubes or rockwool when germinating cannabis seeds for hydroponics, as this will take the risk of damaging the sprouts to the minimum.

Here’s what you’ll need to do:

  • Soak your starter cubes or rockwool pieces in clean, pH-neutral water for an hour.
  • Place a seed inside the cube.
  • Put the starter cubes/rockwool cubes with seeds in them inside the grow tray.
  • Fill the bottom of the grow tray with an inch (2.5cm) of clean water or a very light nutrient solution.
  • Dial in the temperature (20-30C/69-89F) and humidity levels (80-90%).
  • Keep the lid on for conditions close to a greenhouse.

That’s it! After a couple of days, you’ll see your sprouts emerging.

How Long Does It Take For Marijuana Seeds To Germinate?

Your preferred method won’t make much difference in how long it takes for marijuana seeds to germinate. What actually matters when it comes to germinating cannabis seeds quickly is the quality of the seeds, their genetics, and how old they are. Normally, fresh seeds of good quality will never take more than 5 days to show taproot. However, if your seeds have been waiting for their hour for a little too long, it may take them around 10 days to germinate. Luckily, this won’t affect any characteristics of the future plant.

How To Germinate Old Cannabis Seeds

There are several tricks for germinating old cannabis seeds, all of them aimed at making the shell softer or thinner to help the sprout break out:

  • Germinating cannabis seeds with hydrogen peroxide. Before germinating old cannabis seeds, try soaking them in a glass of room-temperature water with a teaspoon of hydrogen peroxide mixed in. This solution will help rehydrate and soften the seed’s shell. After 24 hours in this solution, switch to your preferred germination method.
  • Scarifying old seeds. This is another proven method of germinating old cannabis seeds. Try lining a small matchbox with sandpaper, placing the seeds in, and shaking them there for about a minute. This will cover the seeds in microfractures, making it much easier for the sprout to break through. After scarifying the seeds, use your preferred germination method.

Tips For Caring After Germinating Seeds And Seedlings

As we’ve already pointed out, cannabis seedlings are very gentle, and you need to be careful not to put them in any danger or stress. Use the following tips, and your seedlings will make it safely to the next stage of their lifecycle.

Start Indoors

In order to germinate and survive the first days of life, cannabis seeds and seedlings need to be kept under certain conditions like warm temperature, high levels of humidity, darkness for seeds/lots of light for seedlings, and, of course, peace and quiet. Outdoor environments can therefore be too unpredictable – if the weather changes and brings heavy rain or wind, or if a bird or cat decides to try and snack on the seedling, the young plant most likely won’t survive and you’ll have to start all over. That’s why we recommend germinating your seeds and growing seedlings indoors, where you have full control over their environment.

Choose Soil For Seedlings Wisely

There’s a common term among growers used to describe soil extremely rich in nutrients, and that’s “hot”. While hot soil is beneficial for cannabis in general, especially when made and used correctly, hot nutrient-rich soils, or super soils, are not the best option for young marijuana seedlings. In the early stages of cannabis development, the plant’s nutrient needs are quite low, and too much of them can actually hurt the young plant’s health. So, make sure to use more neutral soil for seedlings. A good trick that you can implement in your practice is to cover nutrient-rich soils with a layer of a more neutral medium and plant the seedling in this upper layer. The plant will develop, and once it’s ready for bigger nutrient intake, its roots will reach the underlying “hotter” soil. Remember that the vegetative stage requires nitrogen-rich media.

See also  Planting Cannabis Seeds Straight Into Soil

Give Seedlings Enough Light

After spending so much time inside its dark shell, seedlings are hungry for light, and plenty of it! As we suggest starting your plants indoors, this means you’ll need to install a light to satisfy the seedlings’ needs. The vegetative stage of cannabis requires mostly blue light spectrum, so anything from fluorescent lamps to full-spectrum LEDs, 100W and up, will work fine for seedlings. Just make sure the light is placed close enough to the plants. The optimal distance for fluorescent lights is 5-6 inches (13-16cm) and 8-12 inches (20-30cm) for LEDs. In case the seedlings need more light, they will let you know by getting tall and leggy. This condition is dangerous for them, so make sure your baby plants are receiving enough light.

Keep Them In A Mini-Greenhouse

Finally, another nice touch to keep your sprouts safe and sound would be to provide them with a small improvised greenhouse of their own. Loosely covering the starting pots or pellets with a plastic bag will do the trick. However, in garden stores, you can also find specialized containers with tall transparent lids. Whatever you choose, this will help the seedlings stay warm, hydrated, and safe from any dangers of the outside world.

Is It Legal To Germinate Cannabis Seeds?

This is a tricky question to answer, as the situation depends on the jurisdiction of your country of residence.

If you’re a citizen of Canada, the U.S., the Netherlands, or Spain – all countries with lighter cannabis policies – it’s legal to germinate cannabis seeds. However, additional rules apply depending on what part of the country you live in and what seed type you want to germinate. Nonetheless, it’s safe to assume that germination of cannabis seeds is legal everywhere where it’s legal to grow cannabis, and especially if you’re planning to start a garden of medicinal marijuana, you likely won’t break any rules by germinating seeds of strains with THC content lower than 1%.

In other countries, governments may draw the line at germination. For example, in the UK, it’s legal to trade and keep cannabis seeds, but you have to be careful with their germination, as this is where the law gets broken.

In our blog, we’ve covered the legality of cannabis seeds and everything you can do to stay safe. For more information, check out the following articles:

  • “Where in the World Is It Legal To Buy Cannabis Seeds?” for tips for residents of Europe, China, South Africa, New Zealand, Turkey, and more.
  • “The Legality Of Cannabis And Its Seeds In The UK”
  • “Is It Legal to Buy Cannabis Seeds in the USA?”
  • “Canada Pot Laws”

What’s the best temperature for germinating cannabis seeds?

Cannabis seeds prefer a warm environment for germination, with the most optimal temperature being 25C (78F). However, it’s okay to add/subtract a couple of degrees from this number while still keeping the air warm.

What’s the best pH for germinating cannabis seeds?

The perfect pH for cannabis seed germination is between 5.5-6.0.

What’s the best soil for germinating cannabis seeds?

It’s better to use light, easily drainable soil for germinating seeds, as this will not restrain the growing sprout. The soil for germination and seedlings should also be neutral or very light on nutrients – “hot” and nutrient-rich soils are only suitable for mature cannabis plants.

What’s the best humidity level for germinating cannabis seeds?

The germination stage requires high humidity levels of 80-90%.

What’s the fastest way to germinate cannabis seeds?

All methods described in this article are more or less the same in terms of the speed of germination. Much more depends on the freshness of your seeds – the fresher the seeds, the sooner they will germinate.

Do weed seeds need light to germinate?

Weed seeds germinate in the dark. So, even after you put a germinated seed in soil, you can keep the lights off. Until the seed pops up through the surface, that is.

Will cracked seeds germinate?

The protective shell on seeds is there for a reason, so any cracks or chips decrease the chances of successful germination. However, much depends on how long ago the crack appeared. And, anyway, it never hurts to try.

How long for cannabis seeds to break soil?

If you put a dry seed into wet soil, don’t expect the sprout to appear sooner than 60 hours. For pre-soaked beans or those that were put into the soil when they had shown a taproot, this may happen earlier. Sometimes in as little as 12 hours.

Cannabis seeds sold in reputable seed shops sprout very fast. Seeds that are old or have been stored improperly may take up to 10 days to sprout.

Starting Off Right

Now you can see that growing marijuana from seed isn’t at all that hard. Just remember to give your seeds enough TLC and dial in some environmental conditions to fit their needs. We’ve shown you some of the easiest and most effective methods of germinating pot seeds. Which one is your personal favorite? Let us and fellow growers know in the comments below.

Herbies Head Shop expressly refuses to support the use, production, or supply of illegal substances. For more details read our Legal Disclaimer.

I’m trying my first seeds using the glass of water method, some seeds have sunk to the bottom and some are floating, are the floating ones no good?

If you lightly “tap” the floaters after they’ve soaked overnight, they’ll sink, they just weren’t heavy enough to break the surface. If they float back up, let them soak another day and tap it. If it still floats, you may have an issue. However, I’ve experienced floaters and after the overnight soak, every floater I needed to tap, sank, and germinated fine.

I used a cotton pad, wet in clear container w/ saran wrap over put in sunlight and after first day checked every 12hrs, and they cracked on the 2nd day. worked well

Hello Keepinit, we are happy to hear that our article is useful to the growers, we wish you best of luck in your hobby!

what i find the most effective way is placing in a coffee filter then putting a coffee filter on top, then put on a plate and place a cup over the seeds and coffee filters and keep moist until germination occurs

What’s the longest you’ve ever had to wait for a seed to germinate and still had a normal, healthy plant? I’ve had 100% success the last 4 strains I’ve germ’ed with seedlings showing in 3-5 days. Recently got 10 Northern Lights seeds from a local vendor, and the first three went 15 days and nothing. I retried with two more and I’m on day 8 and still nothing. Maybe just a bad batch of seeds.. I’m behind schedule now for my next grow!

most good and healthy seeds sprout after a couple days, some older seeds take longer. I usually give them a couple of days to germinate if i still see no signs after 5-6 days i start to get worried.

15 days is a lot. I’ve waited a week at most, longer than that u will see the seed get darker, kinda sluggish nd swelled, that’s a dead seed decomposing, sometimes they just flood

How’s it going? I’m new to the game and was wondering the best way of altering PH level of water? I have an abundance of 500ml bottled water that has a PH of 7.9, a good way off the optimal PH 6 required I know, but is there a way of adding solution to each bottle separately and if so any suggestions of best solution to use? Thanks.

Yes there is ph tester for water that takes drops to test which is the most efficient way to test ph. Also to adjust the ph you want to get ph-up or ph- down I believe general hydroponics is the company for it.

The pic at the top is wrong ,the seed is up side down pistols or the hairs should come out of the seed butt hole that’s how the pollen gets in .2 hairs pair seed one for seed the other for the food sac ,

What happens to Seeds overtime they dry out and the carbohydrate that’s inside of them to feed them becomes weaker. As far as the potency of genetics that does not change however I recommend soaking all Seed between 12 and 24 hours. I use of seed starter MassiveGro invented formula pH to round 5.8 I pour about a quarter inch in a cup put my seeds in there put the next couple on top of it to force them down into the liquid. Occasionally give them a shake you don’t want them to be floating when you plant them. Then I soak my paper towel are use the nice cotton felt like paper towels I think a Brauny or veva with that seed starter formula pour the seed right onto it a ring out the excess moisture put it in a 1 gallon freezer bag place bag up high where it is 80° or put it on the heat mat with a thermostat and check it after one day because it’ll sprout fast. I like to let the sprout get a half inch long and then plant it The biggest problem you have with old seed is the lack of carbohydrate it may sprout then usually burn up all it has and die right away. Unless your seeds got hot you probably won’t have any problem unless they’re more than four years old. Old seed you can assist the carbohydrate by watering the soil with potato water a few drops of corn syrup or a fish fertilizer soak and Endo Mycorrhiza sprinkled around the seed. NPK industries wrong line of Omina is a good gentle amino acid helps break down substances so plants uptake faster when everything’s good I usually mix half strength of the weak dosage. NPK raw stuff can be bought on Amazon in small 2 ounce packages there everything’s pretty concentrated usually last you quite a while. But This is where a seed starter formula comes in because it usually has the carbohydrate to keep it going right away. I use pro mix BX with added perlite and when plants are tiny etc. I always measure my water and times with measuring spoons till a plant is healthy pro mix keeps plants from damning off as long as you’re not drenching it right away because it doesn’t dry out very fast easiest way to kill seeds to drowned it that’s why I measure watering and write it down I don’t try to push or stress my plants I either used seed starter fertilizer or plain pH water until they are about 6 inches high before a poor nutrients to them and once a week I do a full soil drench and drain prior to that you’re probably talking tablespoon or two of Water. Never let your pH get above 6.4 you lock out nutrients and you also root slower, once your plants are growing an strong between the 6 inch and 12 inch stage I’ll use about two weeks of red light will actually give you more roots. You can go to in NPK-University.com sign up for Harley Smith’s advanced grow you won’t be sorry Harley is like the master of the world lol

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