Controlled Atmosphere Storage

Controlled Atmosphere (CA) storage is a post-harvest preservation technique that modulates oxygen, carbon dioxide, nitrogen, and temperature to extend seed and flower longevity. Rather than an aroma itself, CA storage protects volatile terpene profiles by slowing oxidation and microbial activity. This method is commonly employed in commercial seed banking and large-scale preservation operations. Breeders and seed libraries use CA conditions—typically 2-5% oxygen, elevated CO₂, and temperatures near freezing—to maintain genetic material viability over years or decades. Proper CA protocols help preserve the original aromatic and chemical fingerprints of a strain for breeding records and long-term stock management.

Breeders depend on CA storage to maintain seed collections without degradation of cannabinoid and terpene profiles, ensuring accurate phenotype documentation across generations. Seed banks and breeding programs often combine CA with desiccation to lock in germination rates and genetic stability for foundational lines.