- 80–100%: Seeds drown and wilt after about 12 hours.
- 40–60%: Seeds germinate.
- 18–20%: Heating may occur, causing your seeds to sweat.
- 12–14%: Over time, this amount of humidity creates a breeding ground for fungi both inside and outside your seeds.
- 8–9%: Over time, this humidity level attracts insects and pests.
- Temperature changes
In a last attempt to germinate your seeds, creating a small cut in the seed’s shell may help. However, this is no miracle cure, and you’ll need to be careful to avoid damaging the inside of your seed.
Cannabis seeds, with their tough outer shell, seem pretty hardy. And while nature has definitely designed them to hold up to a wide variety of conditions, cannabis seeds aren’t invincible. Rapid changes in temperature and high humidity, for example, can quickly ruin a batch of seeds. Luckily, caring for your seeds is simple. Keep reading to learn how.
When you’re ready to germinate your seeds, inspect them and germinate any seeds with damage to the outer shell first. The outer shell of your seeds is designed to protect the volatile genetics inside. Seeds with cracks in the outer shell are a lot more vulnerable and shouldn’t be stored.
Older seeds often have an extra tough outer shell. Gently scratching this shell with some sandpaper can help moisture and warmth enter your seed at the time of germination. Try gently scarring your old cannabis seeds just before soaking to help them sprout.
Remember, some old seeds just won’t germinate no matter how much you try. Whenever possible, avoid buying more seeds than you plan to plant so as to avoid having any issues at the time of germination.
For long-term storage, it’s best to keep your seeds in a sealed container inside the fridge. Remember that opening the door of your fridge can actually cause some pretty dramatic temperature shifts. If you happen to have a second fridge that gets used less often than the one in your kitchen, use that one to store your seeds.
Ensure you are aware of the laws of your country.
When stored properly, your cannabis seeds can easily hold up for numerous years. Click here to learn how best to preserve your weed seeds.