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Many growers will put their plants into a short stint of flower cycle during veg in order to pre-sex their plants -- allow them to flower just enough to tell sex in order to yank the males -- then put them back into veg until ready for the full flower cycle.
The main reason to do this is so as not to put extra time, effort, and money (and in some cases physical space and good lighting coverage) into growing out males. It's a pain to lug water for weeks for what turns out to be males. It costs money to fertilize males. It's a pain in the rear to continue LSTing males. A grow cab can raise more seedlings than mature plants, so it can be beneficial to winnow the crop down early.
The only real disadvantage to doing this is that it slows down the veg cycle a bit. The plant will continue to veg a little bit during that pre-flower cycle, but most of its energy during that time will have switched to flowering. Many growers find the trade-off of adding a week or so to the veg cycle vs. being able to winnow out the males early to be very worthwhile. Once back to veg cycle the plant's energy goes back to vegging undiminished.
If you have pre-sexed your plants (that is girls, because you would have trashed your boys), that will not make the "true" flower cycle, when you get to it, last longer.
Part of your last comment talks about "flip flops" between veg lighting and flower lighting. To be clear, you should pre-sex only once in a plant's life -- you can start in veg, switch to flower to pre-sex, switch back to veg to grow it out, and then switch permanently to flower. But don't flip the lighting cycles any more than that, there is no benefit to it and you are subjecting your plants to unnecessary stress.
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toastybiz
Last edited by toastybiz; 06-24-2006 at 01:30 PM.
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