Northern California, here.
I generally put my plants into the ground immediately after I harvest the Spring buds. Usually in the last week of April. By this time, revegging is visible, allowing me to choose the most vigorous plants.
The plants generally grow VERY rapidly after transplanting, because the root mass is intact, and supporting less vegetation, allowing it to grow very rapidly. The plants also benefit from all the extra room for roots to spread into.
I do these things based on several decades of experience.
The signature picture below has three plants visible. All three were grown on the above schedule.