No and you dont do this early flower as you can stunt growth.

Since most of these plants stop their height growing at weeks 4 - 5, week 4 would be ideal.

Three feedings in a row...with every water....in place of your normal stuff...

Then, return to the normal stuff as regularly scheduled.

The idea is to hit it right before the plant really kicks in with the full blown resin production and THC production.