thanks guys, We grow cannabis plants for there short lives so we can kill them and burn them so they deserve to have nice time whilst there alive, lol. I wasn't planning to determine the sex when I said that plant was growing fast, it was an observation. I'm really enjoying this grow at the moment. I'm going to switch to 12/12 on monday, as that is week 7 and I think they are big enough. so next photos you see will be under a HPS. at the moment the smallest plant is about 16 inches now. the largest is 19.5 inches