it wont actually flower untill you switch to 12/12 unless it is an auto-flowering type. you(some people) can get a good enough idea if the preflowers are male or female. not me though unless it is really obvious, ive tried and sometimes get it wrong after they start flowering so i dont trust my own observations about it. some people do switch then switch back again, but it is possible to tell without doing that.
twoguysupnorth Reviewed by twoguysupnorth on . Is Pre-flowering comming to soon? My plant is in the pre-flowering stage, but I want my plant to grow bigger before it flowers. Can I keep the lights at 18/6, let it grow for 30 more days then switch to 12/12? Or do I have to let it flower now? Rating: 5