Viability Testing

Viability testing encompasses methodologies breeders and seed producers use to assess germination potential and long-term seed viability. Common approaches include tetrazolium (TZ) staining, which evaluates embryo tissue respiration, and controlled germination trials under standardized conditions. These tests help determine storage stability, predict field performance, and inform seed lot management decisions. Viability data is critical for commercial seed programs, breeding projects requiring large populations, and preservation efforts. Testing protocols vary by cannabis seed type—feminized, regular, and autoflowering lots each have distinct viability curves. Understanding viability testing helps breeders plan breeding cycles, manage seed banks, and maintain genetic stock quality.

Breeders use viability testing to validate seed production quality, predict germination rates before committing resources to large-scale cultivation, and monitor seed longevity across storage conditions. High-viability seed lots enable confident breeding decisions and reduce crop establishment failures.