Hi everyone. I am running Brain Damage and Blueberry Cheesecake in a coco drain to waste system. When is the best time to run PK boosters?

I like adding PK boosters in weeks 4-6 or 4-7 or 4-8 depending on how many weeks the plant should be in the flowering stage.

Not familiar with those, wk 2 of flower larger P smaller K, and in a few weeks the opposite. With your nutrients hopefully they have a schedule and if so id stay with that and adjust if needed.

Are using straight phosphorus and potassium or nutrient line mix?

Are you in veg or flower?