Hull Integrity

Hull integrity refers to the structural soundness and protective quality of a cannabis seed's outer shell or testa. A seed with high hull integrity maintains a hard, uncracked exterior that resists moisture infiltration, pathogenic contamination, and physical damage during storage and handling. This classification is particularly relevant for seed banks and breeders working with long-term preservation protocols, as hull damage can compromise viability and increase susceptibility to mold or bacterial colonization. Hull integrity is assessed visually and through germination testing, where seeds with compromised shells typically show lower or delayed sprouting rates. Different genetics and growing conditions can influence hull development; some cultivars naturally produce thicker or more resilient seed coats than others.

Breeders prioritize hull integrity when selecting parent plants for seed production lines, especially in programs focused on seed longevity and commercial distribution. Maintaining strong hull characteristics helps ensure consistent germination rates across generations and reduces losses in seed banking operations.