Quote Originally Posted by Slevinkal
Pre-flowers are an indication but it's iffy at best.

Boys grow balls

Girls grow pistols (whiteish hair-like things)
But the pistils grow out of calyx, which could be confused as a ball to most new growers, right? Thats why ive read that if you see a preflower and think it could be male, you can wait about a week to tell what the sex definitely is. Thats what the med mj growers bible by jorge cervantes says, at least.