Hi all. There's no trick to sexing your plants by week 4 veg from seed. Have never gone to 12/12 with any strain not knowing sex. All you need is a magnifying glass ( i use an eyelupe 7X), and the ability to differentiate male/female preflowers, it's easy. Many times there's only one or two preflowers early on, but, they are there. I start to look after first xplant, stryro cup to medium container. Generally above or at the 6th node, look for a projection behind the brachts,(may be called something else?), there are 4 (brachts?) at every node, look between the (bracht?) and the new bud growth, for a projection that you will have to learn to identify. I look for a rounded or crab claw projection always with a slight seperation between stem and preflower(like a mini-stem), to identify male. Males are usually first to show sex. The female is a pear shaped pointed projection (watch closely as some males are pointy but show seperation and crabclaw) with no apparent seperation from stem. We all know the female preflower next to the stem with the 2 hairs protruding that change from white to whatever as it matures. Just look closely at that with the eyelupe and you can't miss it on a 3wk old seedling preflower, minus the white hairs. Also, i do use dark time in veg mostly 19/5, so don't know if sex shows under 24/0. Good Luck!
luvtogrow Reviewed by luvtogrow 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