Marijuana Seed Germination Temperature Celsius

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Germination is the first stage in the life cycle of your plant. Getting it right positions your marijuana crop for healthy development and bountiful harvest. Learn how to successfully germinate your precious cannabis seeds every-time with this simple, easy to follow guide. A must read for all beginners. If you read our recommendations on how to choose the best moment to start your outdoor crop, you have probably waited for the good weather to settle in and for the be…

How to Germinate Marijuana Seeds: A Step-by-step Guide For 2021

Germination is the first stage in the life cycle of your plant. Getting it right positions your marijuana crop for healthy development and bountiful harvest. Therefore, it’s worth taking the time to fully understand all the variables involved when you want to germinate marijuana seeds. Due to the varieties of pot seeds, choosing the right strain for cultivation can be challenging, especially for first-time growers. You’ll also have to consider where to buy marijuana seeds at a cost-effective price.

The list goes on!

This guide answers all these questions and provides a step-by-step approach to the following:

Pre parations for germinating weed seeds

How to choose the right seeds

Where to buy marijuana seeds

The five standard germination methods

How to provide the most conducive growing conditions

It also covers some of the rules of thumbs to help your plants produce the highest yields possible.

It’s a long and exciting read, so let’s get the ball rolling with the seeds.

Choosing The Right Pot Seeds

The first step is to choose where to get marijuana seeds . You can get high-quality seeds online or from seed banks near you. Depending on the market demands or your preferences, you have to choose between Sativa or Indica. Your dealer will present you with a variety of strains to select. However, you want to buy feminized marijuana seeds.

That’s because the female cannabis plants are better at producing the massive buds and high quantities that weed lovers crave. Remember to ask for them when buying your seeds. You may not see much of a difference in the seed stage but making this strategic seed selection makes all the difference when your plants mature.

How to Identify Good Marijuana Seeds

Marijuana seeds are p retty distinctive. The fertile ones usually appear dark brown, black, gray, or red-brown with a slight glow as though the peel has some wax. Seeds that look different with colors like light-green, yellow, or white may also germinate, but the color should tell you they’re not high quality.

Usually, such seeds are not ripe because they were harvested at the wrong time. Healthy seeds are oval and small. On average, they should be between 2 to 3 mm thick and 2 to 5 mm long. When buying marijuana seeds , look for dark spots or tiger stripes on them. You also have to take the size and shape into account. In case of any doubts, a float test can help determine the viability of your seeds.

Float test

Although it’s not 100 percent accurate, placing your seeds in distilled water for about 2 hours can determine their viability. Seeds with sufficient mass will sink before the time is out. This indicates that they will sprout. But this test is only advisable when you’re ready to germinate them since the water will activate the seeds.

Tip : Keep your hand dry when handling marijuana seeds since moisture on your finger may damage them. It’s recommended to wear linen gloves to keep seeds safe.

Choosing The Right Cultivation Method

So you’ve selected the right seeds and are ready to germinate. If you’re like most growers, the top question on your mind is, “What is the best metho d to germinate marijuana seeds ?” Chances are you’ve experimented with marijuana germination but didn’t get the expected resulted.

That’s all right because even seasoned growers don’t get 100% germination. There will be some seeds in your batch that are duds. However, you can make significant improvements with the suitable cultivation method.

You should ask yourself specific questions to help choose the suitable method. Some of these questions include:

What kind of grow medium is available?

Can your budget afford all the necessary components?

How much time do you intend to work on your setup?

The answers to these questions will help determine the method you should use to germinate your marijuana seeds. But generally speaking, there are five standard methods you can use.

Continue reading to learn all about them.

5 Basic Ways to Germinate Your Seeds

Germination Station

Using a germination station offers one of the easiest ways to get your pot seeds started towards germination. It is a tool designed solely for this purpose. Doing so ensures that your seeds get the optimal conditions for germination. Assuming you lack the experience and time to try your hands at more demanding methods, using the germination station is the best option.

What is the Germination Station?

The germination station is a dedicated device with a growing space that ensures that cannabis seeds get optimal conditions for germination by allowing you to fully control the humidity and temperature. Usually, the problems faced when germinating marijuana seeds result from a medium that is too dry, too cold, or too wet.

The germination station enables growers to overcome these challenges. The station is the right size, user-friendly, and inconspicuous. It has a heat mat that keeps your growing medium warm with the right amount of moisture. You can house your seedlings in the germination station until their roots are at least 1” in length.

Components of The Germination Station

The station is designed to have everything required to get started with germination. Its components include:

Waterproof heating mat – You may get the 17 Watts, 120 volts heating mat with dimensions 9” X 19.5”.

Humidity dome – Retains moisture in the growing medium for the dampness required by seeds to sprout.

How to Use the Germination Station

The germination station allows you to use any growing medium of your choice in its cell seedling trays. Below are the steps involved:

Step #1: Soak your seeds for 24 hours in water

Step #2: Collect and place the seeds in the cells and use a small amount of medium to cover them.

Step #3: Watch for the sprouting of the first leaves to place proper lighting over the germination station.

NB: Light isn’t one of the prerequisites in this method; therefore, you don’t have to provide your seeds any light when using the germination station.

The Paper Towel Method

The paper towel method of germinating cannabis seeds is popular among home growers for several reasons. It is relatively more affordable, and you only need a few household items like a paper towel or cotton pad to get started.

Pot seeds do well with paper towels because they are kept protected and moist in the paper towels. Some argue that cotton pads do a better job of retaining moisture and are better suited for this method. However, affordable and non-porous paper towels will also do just fine.

Tip : Remember to buy single-ply paper towels instead of the cloth-like ones because the new taproots of your germinated seeds may grow into the cloth-like paper towels.

Let’s look at the steps involved in this method.

Items required

The items required for this method include the following:

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Hand-held plant sprayer (optional)

Bowl or plastic bag

Steps

Step #1 – Spread a handful of your pot seeds on a paper towel and place another layer of paper towel over your seeds.

Step #2 – Moisten your seeds with a hand-held plant sprayer, or you may manually sprinkle some water on them with your hands if you don’t have a sprayer.

Step #3- Place your towel-cushioned seeds between two plates and cover it with a bowl turned upside-down. You can use a plastic bag to protect your seeds instead of the bowl.

Step #4 – Maintain a temperature of about 72° Fahrenheit or 22° Celsius and avoid putting your seeds on a windowsill.

Step #5 – Check on your seed after two to 5 days. By now, you should notice some seeds sprouting with tiny roots shooting from them.

You should regularly check on your seedling from the moment you find that they are sprouting. When the roots are between 0.1 – 0.2 inches or 3 – 5 mm long, transfer them to a growing medium like soil.

Starter Cubes And Seedling Plugs

Another common method of growing cannabis is the use of starter cubes and seedling plugs. The cubes and plugs help set up a seedling station by making the entire germination process quick and easy.

You only have to place your seeds in the cubes or plugs, provide enough moisture, and your seedling will grow automatically. The cubes and plugs are designed with holes to accommodate the seeds. You can scarcely go wrong with this method since the cubes and plugs leave little room for error. Hence, you should achieve a high germination percentage. The best part, there are several types to select.

The Best Types of Starter Cubes For Germinating Cannabis

Rapid Rooter Grow Plugs(Pros & Cons)

The rapid rooter grow plugs are the typical plugs used for hydroponic setups. They have round bottoms and don’t stand alone. Their makeup consists of a custom composting method that uses natural fungi to accelerate growth.

Hence the name rapid rooters. They are also 100 percent organic and made entirely from biodegradable materials. However, they need to be nutrient or water-soaked before use. Below are the pros and cons

There are 50 rooters available at a go.

It’s 100 percent biodegradable and organic.

They are usable in soil and any soilless growth medium.

New growers may find it tricky to use.

Rapid Rooter Mats (Pros & Cons)

Rapid rooters also come in the form of mats. These types are sectioned off and created with holes meant for germinating seeds. You can buy them with 98 planting areas for seed germination.

They can accommodate 98 marijuana seeds at once.

Using them makes transplantations easy.

Each cube is sectioned-off with already-made holes to house seeds.

They come with flat bottoms and cube shapes that enable them to stand alone.

It may be inappropriate if you’re on a tight budget.

Rockwool Starter Cubes(Pros & Cons)

Rockwool starter cubes are a must-use for hydroponic marijuana farms. Using Rockwool cubes for the germination process allows you to place your seedling into your hydroponic system safely. They are made to resist mold and retain adequate moisture to germinate the seeds. But before you decide to go with these, it’s worth knowing their drawbacks.

They are both cheap and readily available.

Come in handy for hydroponic systems.

It doesn’t comprise bio-friendly and organic materials

Can also lead to some health hazard: therefore, you need to wear protective clothing like masks and gloves before handling them.

You need to treat the cubes for use since their original pH isn’t friendly for cannabis germination.

Rapid Rooters(Pros & Cons)

Unlike some other types of starter cubes, rapid rooters work irrespective of your planting setup and growing medium. Generally speaking, they aren’t tricky to use since you only have to put your pot seeds into the rapid rooter with the smaller end turned downwards.

The rapid rooters have perfect conditions that your seeds require to germinate. All you have to do is to provide a place where your seeds can sprout without interruptions. In a matter of days, your cannabis seeds will germinate with tiny visible roots.

Not difficult to use, even for first-time growers.

Works regardless of the growing medium or system

It doesn’t require any setup or preparation.

Only come in sets of 50.

It only takes one week for them to dry up.

Rapid Rooter Tray

Another effective rapid method for germinating marijuana seeds is the rapid rooter tray. You only have to leave your seeds in the tray with water and watch the roots develop with time. A standard tray can go into a humidity dome and carry 50 rooters.

It makes the transplanting of seedling hassle-free.

Enables you to germinate 50 seeds at once.

It is ideal for germinating seeds or cloning when you have a humidity dome.

You only need your seeds and water to get started.

It can be wasteful if you’re germinating less than 50 seeds

Direct Growing Method

Although the various ways of germinating cannabis seeds are effective, there are times that nature’s way is also the easiest. In the wild, marijuana seeds germinate in fertile soil provided there are favorable conditions.

As a cannabis farmer, you can emulate this process by directly planting your seeds in the final growing medium. It doesn’t matter the growing medium you choose. You can get a cannabis seed to germinate provided you use the right approach. However, it’s needful to state that some mediums are more demanding than others.

Using this method means that your young seedlings don’t have to go through the shock of transplantation after sprouting since they germinate in their final resting place. Hence, it can save you some time, and the seedling development is immediate without any interruptions.

Plus, seedlings do not have to adjust to any other environment. Mind you, your marijuana plants have to deal with stress anytime you transplant them into a new medium, and this isn’t the case with the direct growing method.

Assuming you choose soil as your growing medium, here are the steps to follow:

Prepare your soil to be moist but not soaking wet.

Make a knuckle-deep hole in the soil that’s about 0.5 to 1 inch or 1.3 cm to 2.5 cm.

Place your seeds in each hole and gently cover them with soil.

Using a heating pad or light, gently keep your setup warm

Check on your seeds after two days to check for germination.

Apart from the soil, you can also use coco coir or any other soilless growing medium. However, the idea is to exclude the transplanting process. Therefore, you should only choose this method when you know your seeds will become plants in the same medium you used to germinate them.

The Water-Soaked Method

Another easy way to grow cannabis seeds that you should consider is the water-soaked method. It is simple and is just as easy as it sounds. This method involves leaving your seeds overnight in lukewarm water and comes in handy for reviving old or hard seeds.

The lukewarm water softens the hard exterior of the seeds and enables the taproot to break through the coating. When you soak your fertile and feminized marijuana seeds in water, it will take some time for them to sink to the bottom of your container.

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Get clean, lukewarm water and pour it into a container, ideally glass.

Collect your seeds and pour them gently into the water and close the lead.

Observe the container for the next 32 hours.

Carefully pour out the water and transfer your sprouted seeds into a growing medium or somewhere ideal to continue germinating.

Tip : You may use any container to soak your seeds. However, it’s better to use transparent glass since you can observe the seeds and find out when the taproots break out.

Generally, you shouldn’t keep your seeds soaked for more than 32 hours. Not all seeds will germinate after 32 hours. At this point, you should remove them from the water to prevent drowning them. Instead, find a moist, warm place for them to continue the germination process. You can use a paper towel here and follow the steps outlined in the paper towel process.

Planting The Germinated Marijuana Seeds The Right Way

The first few weeks after germination can be the most vulnerable days in the life of your marijuana plant. Therefore, handling them requires you to exercise extra caution. At this stage, the strain you chose makes no difference because all marijuana seedlings are quite delicate after germination.

Always keep the taproot of your seeds in mind while transplanting them. Do not touch it for any reason! The plant may survive when you touch it but break the taproot. However, the effects will show later in the life of the plant, usually as stunted growth.

Follow these tips when transplanting your sprouted seeds:

Drop the white taproot about 0.5 – 1.5 inches downwards.

Let the top part of the seed rest just beneath the surface of your grow medium.

Cover it gently and let it rest for a maximum of 10 days.

NB: Don’t worry if you mistakenly plant any seed upside down. Nature has a way of correcting such incidents. The root will eventually find its way downwards, provided there’s enough room for it.

Providing All The Right Conditions

Light is essential to most plant species, including the cannabis plant. Mature marijuana plants use it to produce sugars from water and carbon dioxide, commonly called photosynthesis. Sugar serves as the primary source of resources necessary for healthy growth and development, apart from soil minerals and nutrients.

Depending on where you store your seedling and the method used for germination, lighting may be required because the seeds need heat. When lighting is necessary, you can use fluorescent lights with 6500K color temperature and T5 high output. The temperature conditions should be around 72 °F.

Next, you need a moist, humid environment. You can spray moisture on your setup when required to keep it from drying up or wrap your pot with plastic wrap. This will create a biodome for your setup. However, you must get rid of the plastic wrap when any tap roots emerge or sprout break through the soil.

Typical Mistakes to Avoid

No matter which method you choose for germinating your marijuana seeds, there are some errors you should try and avoid. Most of these mistakes are common among new growers. Therefore, you should pay extra attention to the following if you’re growing cannabis for the first time.

Placing the seed too deep when planting or transplanting them

Overcrowding the seeds into one pot

Using an unknown soil composition

Overwatering the seeds

Using a direct method where soil conditions are unfavorable

Using too much fertilizer instead of a porous and moist environment

Overusing hydrogen peroxide in the water

Leaving seeds to be drawn in water when soaking them

Failing to hygienically handle radicles, seedlings, and seeds, especially with wet, dirty hands

Exposing the young roots to air for too long when transplanting them

Temperature fluctuation in the environment

Conclusion

Congratulations! You’ve made it this far, and you can consider yourself ready to germinate your seeds. However, it all begins with the right seeds bought from the right source. Then after germination comes other challenges when plants start growing toward maturity. Watching your marijuana plants go through the four growth stages of development is exciting and satisfying. But it’s also hard work so remember to enjoy yourself while you’re at it!

How to germinate cannabis seeds

When germinating cannabis seeds there are a few factors that play an important role. Cannabis seeds need humidity and warmth to sprout. A temperature between 20 and 25 degrees Celsius is ideal. Also besides that, we recommended that you leave the seeds in peace.

A glass of water

Step 1

Place your seeds in a glass of sterilised water, the water temperature should be around 20 – 25 degrees Celsius. Gently push the seeds with your fingertip below the surface of the water and leave the seeds fo float. After 2 – 4 hours, your seeds should have sunk to the bottom of the glass, if not, Gently push the seeds again, they should fall to the bottom. Within 24 / 48 hours, your seeds will have small roots and be ready for the next stage.

Cotton pads – Paper towels

Step 2

Place the seed between 2 wet layers of your chosen material. Using this method, the water will evaporate quickly so it is best to create an environment where condensation can take place. You can do so by placing 2 plates on top of each other with the top one upside down for example. Make sure to check the humidity twice-daily! The material should be humid, not wet!
When the root is longer than 2 – 3cm, its ready for planting.

In soil

Step 3

Choose the size of pot that you will need and fill with a quality soil of your choice. Place your finger into the soil making a small hole in the middle. Carefully transplant the seedling into the soil with the root facing downwards. The seed head should just be covered up by the soil. Wet the soil carefully. Make sure it is wet enough for the seedling to continue growing. Check regularly. The seedling will require 18 hours of light a day in the growing (vegitation) stage.

Seed Storage

We recommend storing your seeds in an airtight plastic bag or container in the fridge. The seeds will stay fresh for years when stored this way.

How to germinate cannabis seeds every time

Learn how to germinate your cannabis seeds successfully every time in our easy to follow guide. Read more

What if my seeds do not germinate?

If your seeds do not germinate for some reason please contact [email protected] for a *free replacement.
*This only applies to seeds bought from this website.”

How to germinate weed seeds?

You can germinate your cannabis seeds both indoors and outdoors, though our recommendation is that you do it indoors, as you will have more control over all the factors that can have a negative effect on the process. But if this is not, below we explain the best way to germinate seeds outdoors.

Our first recommendation, as we already said, would be to wait for the good weather to settle in. Having a high temperature (from 22 to 26°C) is an important factor for your seeds to decide to emerge into the world.

Step 1: protect your seedlings from climate factors and fauna, prevention is better than cure.

Outdoors we never know what dear mother nature has in store for us; in the same way that your seeds might enjoy a week of good weather and sun, there can also be thunderstorms and low temperatures on the very day they sprout. Not to mention the large variety of birds, snails and other fauna that delight in eating those tender and tasty marijuana seedlings. Bear in mind that during their first moments of life, your plants are defenceless against many dangers that threaten them; therefore, it is your job to take care of your little ones and keep them safe. How? It’s actually quite simple, you can buy mini-greenhouses for germinating or you can use a Tupperware and make holes in it for adequate ventilation, although we recommend the first option.

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Ventilation is an important factor; don’t make the greenhouse airtight, open the trapdoors to allow adequate ventilation and as the covers are made of thin plastic, you can even make some extra holes if necessary.

Step 2: choose quality materials.

Today you can find high quality products on the market, specifically designed for germination and which, in addition, are not expensive. What do you need?

  • Germination greenhouse
  • Electric blanket: If you live in a very cold area, a good solution to stimulate germination is to place an electric blanket underneath the greenhouse, thus achieving an adequate temperature. It is important that the probe that measures the temperature calculates the temperature of the blanket, and not of the greenhouse, as otherwise you might heat the seeds excessively.
  • Jiffy 7: This product consists of of a compressed and dehydrated substrate pellet which, after leaving it in water for a few minutes, becomes a small sack of special substrate for germinating, and is also biodegradable. This is the star product that will optimise your germination process due to the following reasons:

– On the one hand it has the ideal structure, that is, the amount of air and water in the substrate is adequate for germination.

– It is sterilised, meaning that we prevent the appearance of fungi (powdery mildew, botrytis, etc)

– It has all the elements necessary to nourish your seed/seedling during the first week; the ideal amount of nitrogen, phosphorus, potassium, calcium and magnesium. Phosphorus and calcium are particularly important for the correct development of roots.

– It has a neutral pH, which is the most adequate and makes it the perfect medium for germination; during one week you just have to add water.

– Jiffy 7 is expressly designed for the mega-industrial production of seedlings and does not require fertilisation.

– Another advantage is the specific temperature: water has a low specific temperature. This means that if we place a glassful of water in a room at 25°, it will be very hard for the water to reach that temperature. Therefore, if we place the cannabis seeds in a very watery medium (a glass or between paper towels) the temperature will be lower, while in a Jiffy, as it is more exposed to the air, the temperature will be higher and the process, faster.

However, there are people who germinate marijuana seeds in paper towels. Why don’t we recommend them? Well, although this method may be effective, it is not the most adequate and has some disadvantages. To start with, the seedlings do not receive the necessary light, as the paper towel that covers the top prevents the sun’s rays from penetrating. In turn, in the Jiffy they do receive light, and therefore photosynthesis will start earlier. Another advantage is that as soon as the root emerges in the Jiffy, it starts to turn downwards and to absorb nutrients: on the one hand we accelerate the process and on the other, when we replant the Jiffy 7 with the seedling there is no transplant shock.

Step 3: follow the method.

  • Put the Jiffys in lukewarmwater.
  • Once the Jiffys have expanded, make sure that they are thoroughly wet (don’t squeeze them, just remove the excess liquid if they are dripping). Monitor the pH (between 6 and 7) and the EC (less than 0.5 ms) of the water.
  • Insert the seed in the central hole of the Jiffy, not too deep (approximately 5 mm) with the tip pointing upwards. The marijuana plant must not be sown too deep because otherwise the root has to travel too far: it always emerges through the pointy part of the seed, turns 180°, penetrates into the soil, and once it is secure, it raises its “head” from where the cotyledons will grow.
  • Place the Jiffys in the greenhouse as well as a thermo-hygrometer to monitor the temperature and humidity.
  • Temperature control: it must not fall below 20 degrees nor exceed 30. If you put the greenhouse in the sun, it can get very hot; you must constantly monitor the temperature. If it exceeds 25 degrees, we recommend that you lift up the top cover to ventilate it. Another important factor you have to check is humidity. If it is very sunny, the Jiffys will dry up and it is important that they are always humid. You must therefore add water when necessary, though not in excess. They should only be soaking wet during the first two days. After one week we should already have marijuana seedlings; with their two cotyledons (the first two round -shaped leaves), before the first two real leaves sprout (the serrated leaves), transplant them. If they are autoflowering seeds, we recommend that you transplant them to the definitive flower pot, though if they are feminised seeds you can transplant them to a smaller pot and then, when the plants are larger, you can move them to the definitive pot.

For indoors: The same but under a grow light, fluorescent or LED. If you have the option of germinating your cannabis seeds inside your home, ideally the light intensity will be high; the less intense the light, the more the seedlings will stretch in search of light and become spindly. If you use a 400 W light ideally it should be 40-45 cm away.

Now that you know how to take your first steps, you’re ready to start this season’s crop. Have a good harvest!

Author

Kushka Barcelona-born journalist and grower with a curious spirit. I used to spend my life travelling, writing and working with cannabis clubs until Professor OG called me. My two passions, the plant and the writing, have followed the same path ever since. I absolutely love tricky subjects, those that oblige me to spend days buried in books, investigating and driving the entire technical team crazy. There’s no way I can write a story without going into the issue in depth. I enjoy challenges, but even more sharing them with you on our blog. You can find on instagram at @_kushka.

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