JoEllen, if you went to Succulent Gardens in Castroville already then in my
humble opinion, you don't need to go to any other since you just went to the Ultimate of succulent nurseries. I remember going there and was totally overwhelmed such that I told my hubby to go home and pick me back up tomorrow because I was going to take so long...
Are you closer to SG? if not there's also Lone Pine in the North Bay in Sebastopol
http://www.lonepinegardens.com...
Cottage Gardens in Petaluma.
http://www.cottagegardensofpet...
Flora Grubb in San Francisco
http://www.floragrubb.com/idx/...
There's tons of succulent places in LA area and near San Diego I'm sure.