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how to store weed seeds

How to store weed seeds

When it comes to preserving your seeds for future planting, temperature is the main consideration. In nature, heat is what tells the seed that the winter’s over, which means that it’s time to break open and start sending roots down and shoots up. If your seed’s not in the soil, this means that the plant matter inside the seed will begin to germinate. The shell will crack open, letting the plant matter out and moisture, bacteria, and pests in. Without soil to thrive in, the seed will begin to rot.


First, let’s go over the five main factors to consider when it comes to storing your cannabis seeds, especially for the long term.

41℉ (5 ℃) is the absolute warmest you want your long-term storage spot to be, with the sweet spot being somewhere around 38 ℉.

T here’s a lot of reasons to store cannabis seeds rather than just planting them in soil and letting them do their work. Sometimes you have some seeds leftover from your new favorite strain and don’t have the space available where you live to plant it. Sometimes you’re buying seeds for later use once you’ve got the time and energy for your planting project. Sometimes you’re just stocking up for an uncertain future.

How to store weed seeds

Whichever type of container you choose, it is best if you can vacuum seal it, or vacuum seal the seeds inside a smaller container within the other one. As mentioned above, keeping oxygen levels low is ideal and the best way to do that, and also ensure minimal environmental fluctuations, is to keep the seeds in a vacuum.

A good way to ensure the seeds stay dry is to include a desiccant in the container in which you are storing the seeds. A common desiccant are those little packets of silica gel that are often included with products that need to stay dry. Include one in the container with the seeds and swap it out every 6 months. You could also use rice kernels in a pinch.

Plastic Container (Like A Film Canister)

You could also bury your seeds underground. This may seem strange, but if you go down deep enough that changes in air temperature don’t affect the ground temperature, this is actually a great storage location. You’ll definitely want to use desiccants to keep the humidity steady. And, of course, make sure you remember where exactly you buried them.

If you have no other option, at least put the seeds in the back of the fridge, where they are least affected by changes in temperature from the opening door. If there is a desiccant in the container with the seeds, the changes in moisture won’t affect the seeds either.

Maintain Fixed Conditions

If you are only storing your seeds for a short period of time (no more than a few months) a relative humidity between 20% and 30% is fine. If you are storing them longer, you’ll want to go lower than that. Aim for a humidity level of around 8% to 10%. Even for short time periods, drier is better.