Seed Storage Humidity

Seed storage humidity refers to the moisture level maintained in the environment where cannabis seeds are preserved, typically expressed as a percentage of relative humidity (%RH). Proper humidity control is critical for maintaining seed viability during storage, as excessive moisture can trigger germination or promote mold and fungal growth, while extremely dry conditions may damage the seed coat and embryo. Cannabis seed preservation protocols commonly recommend storage between 20–30% RH, though some breeders and seed banks work with even lower ranges (5–15% RH) for extended archival storage. Humidity levels interact directly with temperature to determine longevity; stable, cool conditions combined with low humidity can preserve seed genetics for years. Understanding and controlling storage humidity is essential for both commercial seed producers and home growers managing breeding stoc

Breeders maintaining seed banks and genetic libraries rely on precise humidity monitoring to preserve rare or foundational genetics across growing seasons. Seed storage protocols are a core practice in professional breeding programs, ensuring that selected parent lines remain viable for controlled crosses and stability testing.