We have some Lowryders growing at the mo, and we just harvested some, the first batch showed sex by day 15, the ones we have growing now took 20 days, but all in flower now. They were opn full strength nutes by the day they showed sex, don't think you s'posed to top a Lowryder, we never anyway, ended up with nice bushy plants, attached a couple of pics anyways, at day 30 and day 45