i would take 8-12 weeks with a grain of salt. your trees could be over your grow room. personally, the best time I have figured out, actually potroast told me, double the size of your tree and that is what you are going to end up with at the end of flowering. it the tree is a big yielder, figure on tripling the size. an easy rule of thumb there. PEACE!

__________________

Spreading Happiness One Bud at a Time