Tetrazolium Test: a fast, reliable test to determine seed viability

Authors: Elias, S. & Garay, A. Date: 2004

The TZ test, one of the most significant discoveries in seed testing in the 20th century, provides an answer. It determines the percentage of viable seeds within a sample, even if seeds are dormant. This is particularly useful for freshly harvested seeds that possess high levels of dormancy such as some grasses and native species. The results of the TZ test indicate the amount of viable seeds in a sample that are capable of producing normal plants under suitable germination conditions.

Download (PDF): Tetrazolium Test: a fast, reliable test to determine seed viability (241KB)

Processing Seeds of California Native Plants

Author: Rancho Santa Ana Botanic Garden Date: 2009

This manual focuses on the seed processing steps that precede – and are necessary for – successful propagation and long-term seed storage. It targets California native plants and plants native to northern Baja California, Mexico, but the general techniques are applicable also to other physiologically or taxonomically related species.

Download (PDF): Processing Seed of California Native Plants RSABC (14.8MB)