Seed Moisture Content

Seed moisture content (SMC) refers to the percentage of water present in cannabis seeds relative to their total weight, typically measured on a dry-weight basis. Proper moisture levels are critical for seed viability, dormancy maintenance, and long-term storage stability. Most viable cannabis seeds contain between 8–12% moisture content when freshly harvested; seeds below 5% risk brittleness and reduced germination, while those above 15% become susceptible to mold, premature sprouting, and pathogenic colonization. SMC varies based on drying methods, environmental conditions during storage, and seed coat genetics. Breeders and seed banks monitor and standardize SMC to ensure consistent germination rates and genetic stability across generations.

Seed producers carefully control drying and storage conditions to maintain optimal SMC for their seed lines, as this directly impacts germination reliability and customer viability rates. Understanding SMC genetics—how different cultivars naturally regulate seed moisture—helps breeders select for robust seed production and storage longevity.