Yeah probably. Never used it but from others that have grown have done that as the nitrogen reqs drop off. I would recommend continuing veg feed schedule until stretch stops even though they are budding, then add in the pk booster and you can supposedly extend the chop a couple weeks longer for a heftier yield. Somewhere around week 6 add the pk booster and lower the mc is what I have seen a lot of people do with good success, and my game plan for next grow!