Sorry Greenmonster, But it is enviroment. I have a tron that I can almost get 100 % female with nirvana seeds. Do a sheach on how seeds determine sex and at what point in their life. I would like to here from Zandor about this since he has books coming out. You were just unlucky in what is setup. What other seeds do you have to compare with this. I have had a tron for 20 years and tried thousands of seeds with very similar results. I love nirvana sorry man. Got a bunch more coming with 2 other companies seeds I can compare. The only problem I had was with fem seeds , they are delicate and need close watching till they take good. Like they said most companies will send more most times to keep a customer.