How to Germinate Cannabis SeedsNovember 26, 2018
In this guide we will cover how to germinate cannabis seeds. These methods are tried and tested over decades of growing. Most cannabis growers will germinate their cannabis seeds using these methods with over 95% success rate.
The main focus when germinating cannabis seeds, is to keep them warm, wet, and in the dark. They are very quick to germinate, and will usually see signs of a tap root within 24- 48 hours. With a green shoot to follow around 2 days after planting them.
Soaking Your Cannabis Seeds
Start off by soaking your seeds in some warm water. The older the seed is, the harder the shell will be. Soaking the seed will soften the shell, and make it easier for the tap root to push its way out.
When the seed sinks, it is because water has made its way inside. At this point, the seed is not getting any air and it will drown if left underwater for too long. It can take just a couple of hours, to a whole day before a seed may sink.
To increase the chances of germination, it is advised to use the “paper towel method” to fully crack the seed and expose tap root. This is the best way to germinate cannabis seeds.
Germinating Cannabis Seeds Using The Paper Towel Method
- 2 Plates/ Saucers
- Some warm water
- 2-4 Paper towels
- Cling Film/ Plastic Wrap
- Your pre soaked seeds
The Paper Towel Method
Place a paper towel onto one of your plates, and pour water all over it, fully wetting the whole towel. It should be wet, but not so wet that it will drip if turned upside down.
Place your seed/s gently onto the paper towel. Now cover them with another paper towel, and add a little more water if you need to. The idea here is to give the seed plenty of moisture, and air. You want to trap in the moisture for high humidity.
Take your second plate, turn it upside down, and place it over your seeds and towels, as if it were a dome.
Now, gently wrap the plates in cling film or plastic wrap to trap in the moisture further. If at any point the paper towels start to dry out, add more water and re-wrap the plates. If the seeds get dry, they will die, and you will have to start again.
Where to Keep Your Seeds Whilst Germinating
You need to store them somewhere warm, at around 21c. Using a warm place like on top of a games console, modem, or another device that will be turned on for 24 hours will work. But a heated propagator is best ( buy one below).
How to Plant a Cannabis Seed Into Soil
After 24 hours, and anything up to 72 hours, your seeds will “pop” and you will see a small white root appear. This is called the tap root.
Once your medium has been prepared and ready for planting, make a small hole in the centre, about 5mm deep.
Take your seed, and gently place it into this hole, with the tap root, pointing downwards. Then, gently cover this with a light layer of your medium or soil.
Keep an eye on the top of the medium and make sure it does not dry out. Water every day, just a little bit, to keep the medium damp. You can use plastic cups, as a dome over the top of your seedlings to hold the moisture and the air in, increasing humidity.
Your seeds should have popped within a few days, and you will see the shoot coming through the top of your medium. When you see the shoot, it’s time to get them under some light.
If you still have trouble, and the seed still hasn’t popped, you can scratch the shell with some sand paper, or a nail file to weaken it, and start this whole process again. Using Percys Grow Guides methods, there is a 95% chance of success.
Using a Heated Propagator to Germinate Cannabis Seeds
If you do not have a warm place to store your seeds whilst they are germinating, it might be a good idea to invest in a heated propagator for them. A heated propagator can be as cheap as 2 cannabis seeds, and it will improve your germination rates, so will pay for itself in successfully germinated seeds.
Click on this Image to Buy a Heated Propagator!
Be careful not to over do it with temperature when germinating cannabis seeds. Keep temperatures no higher than 23c, any hotter and you could damage the seed, and stop germination all together.
Start a Grow Journal with Your New Seeds!
If you’re new to growing, we can help you get to harvest in our cannabis growers forum. Start a grow journal now, and you will be guided step by step all the way through your grow. If you buy seeds from one of our partners, you will get a 10% discount code on your purchase. Not only that, but if you complete your diary in full, you will receive some more seeds FREE!
Thanks for reading! You can find more information on anything related to growing in our cannabis grow guides. All of our guides are written by experienced growers, and members of our cannabis growers forum. If you have any questions, sign up. It is free, and we are always happy to help!
Good luck with your grow, I hope to see you in the Forum soon! Stay safe, and Happy Growing