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I have been growing my second generation and was wondering, I switched from 18hr cycle to 12 hour to filter out the males, (incidentally I only had one male from 12 seedlings) well they started to show sex, i separated the male and put them back on a 20 hour cycle, but they are kinda going crazy with buds all over the plants...
is this cool, or should I switch back to 12hr to just let them bud????
Of course, you turned on their flowering button so now you have to wait while they switch back to the veg cycle. Next time be more patient and wait for the preflowers with your handly 10x minimum power magnifying glass to avoid that as it'll delay the overall growth plus it adds additional chance of going herm. Preflowers usually show by week 8, 10 at the latest which is about the minimum age for beginning flowering, or after alternating branching is well underway. That's always a good sign for the plant reaching maturity.
Better yet- get a good rooted cut from each plant. While they're rooting, flip the mom's back into flower. Pay attention to which plant is best for your style, taste, neurochemistry.
Meantime, re-veg the cuttings, and when you have a favorite, grow it out as a cutting source.
Then you won't need to worry about it anymore.:D
But seriously, flipping the photoperiod around is profoundly stressful to the plants, and will produce an unsatisfactory structure- you should really try to avoid it.
And this is exactly how you produce male flowers on a female plant.
Once you've flipped a plant, finish it out- but take a cut before you flip.
Yes, that works too but I live my life by the K.I.S.S. principle.