besides th fact of having feminized seeds or using product bought from the store i've read you can also use a estrogen pill from your gf or whoever and that can also help with the likely hood of producing a female plant, you crush the pill in distilled water then you soak the seed/s in the solution and then germinate them ina paper cloth soaked with the same solution, it sounds liek a good idea but to me there have been scientific studies shown that increased amounts of estrogen in today's environment has lowered a mans sperm count dramatically. I am unsure of the actual amount of estrogen found in the end product after you use this process but i surely don't want my troops being affected by this.