Mine has had preflowers on her for about a month now, maybe longer. She's completely covered in them from head to toe. I expect her to start flowering in about 2 weeks. If not by then, i'm gonna have to dose her with as much P and K I can anyway, without risking burn, as i'll have to leave her to herself for a month while i'm overseas. It's not an ideal situation, but it's the best I can do.