Seed pods were found on plants in April. Other seasonal patterns and dates for the reproductive stages are not known. Lupinus aridorum is endemic to Orange and Polk Counties, Florida, where it grows primarily on well-drained sandy soils of the Lakewood or St. Lucie series. The sands are white or occasionally yellow where the turkey oak woods have invaded the sand pine scrub. Existing populations are remnants of the formerly more wide spread sand pine scrub community.
Soils are very dry, with very little organic accumulation.
Not reported, but probably a component. Ten of the sites inhabited by Lupinus aridorum are in Orange County, between the City of Orlando and Walt Disney World. Orlando has been, and continues to be, one of the most rapidly growing cities in Florida. Six sites are in Polk County, near Winterhaven and Auburndale. These are also rapidly expanding communities whose growth threatens the continued existence of the Scrub lupine.