I'm also in the Sac valley. My kids went in on May 28, 8 plants of various strains. Seems like plant genetics have a lot to do with the life cycle of the plant. I have a Kush that's in full flower now, a purple diesel that is close behind, the a NY sour diesel and 5 trainwrecks that are just now showing sign.
You might try a bloom-oriented nute, it will help kick them into overdrive, but not to worry, plenty of season yet to go.
Post up some pics!