Cannabis seeds are a valuable commodity – for both passionate growers and dedicated collectors. Proper storage is essential to maintaining their full germination potential for months or even years. In this article, you'll learn how to optimally store cannabis seeds, what to look out for, and what mistakes to avoid.
Why is proper storage of cannabis seeds so important?
Cannabis seeds are living organisms in dormant mode. Under ideal conditions, they can survive for years – but only if they are protected from moisture, light, heat, and oxygen. Improper storage can lead to mold growth, dehydration, or premature germination. In the worst case, this means unusable seeds and a frustrated start to the next growing season.
The 4 enemies of germination
Before we get to the best storage methods, let's look at the biggest dangers to cannabis seeds:
- Humidity: A humidity level above 10% can cause mold or premature germination.
- Heat: High temperatures accelerate the aging process and reduce germination capacity.
- Light: UV radiation can damage cell structure and shorten lifespan.
- Oxygen: Oxidation causes the seeds to “age,” which reduces their germination rate.
Storing cannabis seeds correctly: The best methods
1. Store in a cool, dark and dry place
The ideal environment for cannabis seeds is:
- Temperature: 4–8 °C (similar to refrigerator)
- Humidity: 5–9%
- Light: completely dark
2. Use airtight containers
The best options are:
- Vacuum-sealed bags
- Small screw-top jars containing silica gel (a granular, porous desiccant used to absorb moisture from the air)
- Special seed boxes or opaque containers
3. Store in the refrigerator
A constant cooling compartment, such as the vegetable drawer in your refrigerator, is ideal. Important: Only open containers at room temperature to avoid condensation.
Long-term storage: How to keep cannabis seeds viable for years
- Use vacuum bags or jars with silica gel.
- If possible, place them in a separate refrigerator that is rarely opened.
- Label the seeds with the variety and date to keep track.
Common storage errors
- Plastic bags without protection: They allow oxygen to pass through and offer no protection from light.
- Daylight: UV rays are the number one enemy of germination.
- Freezer: Deep freezing can destroy cell structure, especially during temperature fluctuations.
Storage determines quality
Proper storage of cannabis seeds is key to healthy plants and successful grows. With a little planning and the right materials, you can preserve your seeds for many years without any loss of quality. That's why House of Seeds always stores all cannabis seeds in cool, dry conditions in specially designed refrigerators to ensure maximum freshness and germination. Not sure which strain is right for you? Click here for our seed selection guide.
