
HerbalEdu
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somebody out there somewhere, not you but you have heard... anyone sexing a plant on 12 -12 is doing it the slowest possible way...outside of 13 - 11 which some cannabis plants do actually flower on 13 hours light. Try it. Sexing it with the bare minimum darkness could take weeks. 2 maybe 3. People flower with 12, 13 because they think maximum light equals maximum yield. But remeber, its a plant that gets happy, flowers and gets excited about darkness.
Sexing on 6 hours light gives it maximum darkness yet provides just enough light (meager rations) for it to manage its processes just fine. But it's only for sexing. 6 is too much of a slimming diet, not recommended for long periods. It's not uncommon to sex a few adult plants in 4-5 days from a group if you have 9 or a dozen to look at. There is always fast ones and slower ones. If you have been abusing them with light stress on 18 or 24 hours light... they arent happy and may not cooperate. So really I would say this quick sexing is for adult plants accustomed to 16 or less daily light integral. 14's will be ready and willing to party and get naked.
Be bold, and drop your known favorite variety you are familiar with into 10 -14, 2 more hours more darkness than normal for flowering. Hit it with 10 hours intense light. You will be surprised with the result. Photoprotection is a real phenomenon, not a myth. Take note of the differences in quality, resin production, bud size, growth pattern, finish time. When you see differences, try 9, 8. Really dial that shit in for that variety. If you are experienced, you may even like to try it out of boredom. But be prepared for interesting things. Then go full ape and start flowering cycle with 12-12 and drop that time a little each week with a 6 or 8 hour finish that last week.
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what trigger flowering is the release of florigen hormone that happen when enough night time, if you want to create a spike in florigen hormone release you could just make a transition to flower with 24h darkness or 36h darkness, this make the plant produce preflowers and flowers much faster ...