I am probably the luckiest hobby grower on the planet, maybe! For 3 yrs of growing I have had yet to grow a male plant, until NOW!!!! Now I can't get rid of them fast enough before they get my girls. I check 2 times a day but with limited knowledge, since I've been so lucky and all, that I either miss the early signs or they develope fast into males. Any sure fire ways or pics of early signs anyone can share?