Approximately 90% of big sagebrush seed is dispersed within 30 feet (9 m) of the parent shrub. Few seeds are carried more than 100 feet (30 m). Density falls off rapidly away from the parent shrub, with maximum seed dispersal at approximately 108 feet (33 m). The rate of seed dispersal depends on wind and storm activity after seeds reach maturity. Rates of seed dispersal are slower in basin big sagebrush than in other subspecies. Seed dispersal takes approximately 8 weeks. Seed of basin big sagebrush is short-lived and lasts less than 5 years when stored in a warehouse. Some seedbanking occurs in other subspecies of big sagebrush, so seedbanking in basin big sagebrush is probable. Some basin big sagebrush seeds remained viable after prescribed burning in Utah. Emergence of basin big sagebrush seedlings on burned soil was reduced, however, compared to emergence of Wyoming and mountain big sagebrush. It was also reduced compared to emergence of basin big sagebrush on unburned control soil (Tirmenstein, 1999).