Lavender is an amazing crop - with a mind of its own-  most picturesque blooms are from late July to October, but with plenty of winter/spring rain, move that up about a month or two.   Provence can bloom as early as late May and goes through the fall.  Angustifolias (our favorite is Premier)  bloom May  with another great bloom in the fall. Of course, it all depends on rain!
  Our Samuel helping the bees this year.