Mine sometimes takes ages to flower, see my Alien x Triangle been in veg for a good 5 weeks at least, and my GSC from FastBuds was, also noticed that by defoliating a little can cause the plant to stay in veg longer, would say this is strain dependant and potentially, could cause some strains to flower early. I think a good root stim product is better to use for seedlings and veg rather than grow straight away. The plant needs some humates at that time in its life imo.