Germination results were obtained from seed stored in an open warehouse in Sanpete County, Utah, over a 15-year period for 18 shrub and 14 forb species. Seed viability was not appreciably affected for 14 species stored at least 15 years. Seed viability did, however, significantly decrease for two species stored 10 years, for five species stored 7 years, for seven species stored 5 years, for three species stored 4 years, and for one species stored only 3 years.
Stevens, Richard; Jorgensen, Kent R.; and Davis, James N.
"Viability of seed from thirty-two shrub and forb species through fifteen years of warehouse storage,"
Great Basin Naturalist: Vol. 41
, Article 2.
Available at: http://scholarsarchive.byu.edu/gbn/vol41/iss3/2