How to make my seeds female?

I bought 15 white widdow seeds off my friend. I want to know is there anywhey to guarantee or even help my seeds turn out to be female?

Blue light in early development stages, the bluer the better.

there are ways to influence the outcome a little. generally works for me, getting @ 80% females if conditions are right and not messed with during the first 5 weeks.

http://www.1stmarijuanagrowerspage.com/how-to-improve-female-male-ratio-of-cannabis-plant.html

Man just grow them eventually you will get some females..Keep and clone them you should be fine..

great link there eyecandi . gonna put that info to use . 1 up
.

tanks

I have 7 in week 3-4 veg right now (2 more weeks before I clone em for sex) and some new beans I picked up from Centennial Seeds ('21' and Roughneck) will get started tonight (full moon, winter solstice .... should be some great beans poppin!!!)

GL, can't wait to see how it turns out

oh yeah man just dissolve some birth control in the water that you germ your seeds with haha (this is total sarcasm in case it didnt come across in the text lol)