regardless of whats in the premix i feed at 2 weeks i been using coco so i start feeding foxfarm grow big, superthrive, and b'cuzz root as soon as they sprout after 2 weeks i feed dyna-grow i need to invest a ppm meter but i nuke em untill they get minor burn, the premixed might have enough to keep them alive but not enough to make em fat if that makes any sense, you could survive on a piece of bread and a glass of water 3 meals a day but your not getting a whole lot of nutritional value from it basicly what your doing to your plants you limit their growth