Stress comes more from heat then light.

Germinating light cycle is 12/12 until they have the first set of leaves then switch to 18/6 for vegetation. Ed Rosenthal, Al Frank and some others claim it's the light cycle that increases the chance.
Zandor Reviewed by Zandor on . Greater female chances? Hey everyone. I was reading a thread.. either on here or overgrown.com... and I read that lower light= greater chances of female (like around 17 hours of light instead of 18). I was wondering if there is anything I can do to help greaten the chances that I will have a female? Theories... anything. Let me know. Rating: 5