Is it possible for a plant 20 days from seed to be showing its sex (male) already? I haven't begun to flower them yet, still in 18/6 cycle with MH bulb. I would post a pic but I can't get a good shot with my cell camera....
if its an autoflower strain, you can have 24hr lights on it and it will flower. You may have had a stray seed tossed in your bag dude. Stoners do all kindsa silly shit ....
no u dont have to put ur plant in to 12/12 for it to show sex it should show sex in the 4th week of veggin from seed so yes it is possible to be showin sex