First, don't plant them now -- at least not without checking online gardening sites. Local shops often sell bulbs way too early in the season, and that always annoys me no end.
The **responsible** online sellers won't be sending me my bulbs until the middle or end of October -- and even that's earlier than ideal here in zone 7a. I'm not familiar with California, but I would bet this is much too early for you as well.
Google some gardening sites for California and see what they say before you plant. Here are three sites to start with, but check several different sites to see what the consensus is:
https://www.gardeningknowhow.c...
http://sacmg.ucanr.edu/Sacrame...
https://www.ocregister.com/200...
