The Botanic Garden is at an elevation of 1,350 feet on the outwash plain of the San Gabriel Mountains - with views of the mountains. The peak flowering season is March and April and there is a large collection of Manzanitas that flower from late November to early March.
Rancho Santa Ana Botanic Garden (RSABG), 1500 North College Avenue, Claremont, California, USA, CA 91711-3157
See Santa Ana website for opening details:-