Are airtight containers necessary for seed storage?
Written by
Julia Anderson
Reviewed by
Prof. Martin Thorne, Ph.D.Maintaining the viability of your seeds requires ideal humidity control. Airtight containers provide your seeds with a necessary barrier to moisture. They keep the moisture that is in the surrounding environment away from your seeds. Therefore, maintaining your ideal storage conditions is essential. If this were not in place, your seeds would begin to fail and lose their germination potential quickly.
Humidity Protection
- Blocks external moisture from penetrating seed storage
- Maintains stable humidity below 40% RH consistently
- Prevents mold growth and seed clumping completely
Longevity Extension
- Slows oxidation processes that degrade seed embryos
- Preserves cellular integrity for years longer
- Maintains germination rates above 80% for 5+ years
Opt for containers with silicone gaskets or locks for secure seals. Glass jars help you maintain visibility and durability. Metal tins resist rodents well. Vacuum-sealed bags give you the most protection. Replace desiccant packets every 6 months.
Check container seals each month when containers are being stored. Check for air leaks by pressing on lids. Listen for hissing sounds when opening lids. If condensation or moisture is observed in any container, replace it. Properly sealing containers ensures seed viability from one season to the next.
Read the full article: 3 Essential Rules: How to Store Seeds
