There is a chart around somewhere.....lower temps encourage females. I believe latewood said something about trying less lighting during veg (15 hrs light instead of 16 or24) and less humidity are among the factors mentioned. I did try the 15 hour thing last grow....ended up with same ratio of females as before.

The feminiser will not MAKE females. I thought this when I originally bought it but in actuality what it does is keep plants from becoming hermies due to stress. I am a huge believer in it.....my first grow (including my outdoor stuff) yielded 4 hermies out of 15 females....different kinds of seed as well--non of them purebred seeds. My hydro guy sold me this and I have not had a hermie since. 0 hermies in 11 females. Huge ratio difference in my book. All different seeds. And while I always swear to myself to reduce my plants stress.....I have not been able to accomplish that yet.....I keep finding SOMETHING to stress my plants out.