Low Humidity Storage

Low humidity storage refers to preservation conditions maintained below 55-60% relative humidity (RH), commonly used in seed banking and cannabis genetics archival. Breeders and collectors working with this approach aim to extend seed viability and slow metabolic activity during long-term storage. Storage at lower humidity levels—typically 30-50% RH—combined with cool temperatures and airtight containers, has been documented to preserve germination rates over extended periods. This method differs from equilibrium storage practices and requires desiccant materials or controlled environments. Lineage preservation programs frequently employ low-humidity protocols to maintain pure genetic lines across seasons and generations without unintended crossover or degradation.

Breeders maintaining seed libraries and foundation genetics rely on low-humidity storage to keep seed banks viable between breeding cycles. This preservation method supports consistent access to parent lines and reduces the need for frequent re-stabilization of established cultivars.