Saw that Bushmaster is mentioned above, and just wanted to CAUTION people about the stuff...I actually like it and use it most of the time because I have limited headroom in my flower space, and it keeps the plants from getting too big. But it is VERY strong stuff. I would recommend using the low end of the suggested measurement for 2-3 days right before you put them into flower, and then as Martyr mentioned, flush them out really well before making the transition. You may even notice that, even with a light dosage of Bushmaster, the plants look a little sick for the first week or so of flower. But they'll bounce back, and they'll produce quite nicely...
Lephty Reviewed by Lephty on . toping during flowering is toping your plants during the first week of flowering a bad idea. Rating: 5