Buddy, you can put your plants in the dark for a few days in a row...forget wtf these arm-chair botanists say. If you want to "trick" your plants into sexing, you could make the light it receives to less than 12 hours per day until it turns, OR, if you leave your plants in total darkness for say 3 full days (say if it's raining or cloudy would be a good time to do this), it very well could speed up the tricking process. It worked for me one year. I was only a couple days into covering my plants with a thick plastic bag, when I got dope sick from heroin. I covered my two plants with bags, and went to detox for a few days. I thought they might be dead when I went home, but I wanted to be dead too, so WTF eh? I went home, took off the bags and it had "Bart Simpsons" all over them both. Both plants went into full bud stage during that 3 days of total darkness. This might not work all the time, but it can work. I'd try either covering your plants or putting them in a dark place to make sure the light is very low for at least 12 hours a day until you can either see white hairs (PUSSY HAIRS) or what looks like a bunch of tiny green bananas (TESTICLES). You can also use the fertilizer 10-52-10 to make the change into reproduction. Sometimes, just the change from 20-20-20 (or vegging compound ferts.) to the flowering/fruiting formula of say 10-52-10 (where the middle number phosphorus is high), the plants can trick by themselves. 12 hours of dark doesn't have to be exact. As long as you get at LEAST 12 hours of darkness each day, your tricking of the plants will work, but 12 hours isn't written in stone. Some strains will turn into sexing when the light is still over 12 hours a day. This year, all three of three turned female when getting over 14 hours of light a day. It just depends...nothing is "written in stone" regarding growing pot successfully...just basic guidelines to give you an idea. Actually, when the plants are budding, it's better to be in the dark because that's when all the good stuff happens...in the dark...just like when you're with your partner in bed type thing. I hope this helps you.