I know this is a very old thread, but I just don't want somebody to think this is the correct way to use Gravity. DO NOT use this product within the 1st 5 weeks on an 8 week strain. It is not a nutrient, it is a plant growth regulator, so it does not 'boost' plant growth, Gravity is a flower hardener, when you don't have flowers you can't harden them. Please, anybody using this product wait until your buds are already developed and then you can harden them with gravity the last 2-3 weeks.