Quote Originally Posted by Zandor
The sex of this plant is not in the DNA of the seed. It's in the RNA of the strain. You can't tell a Male from Female by just looking at the seed.

Sorry but who ever put that chart out is pulling your chain.
maybe I am lucky...BUT I only use this method when selecting seeds and I have gotten nothing but females, always. And this is all from bagseed mind you. My heat always stays in the mid 80's during day, and the 60's during night, my nutes for grow are 7-9-5, higher in P than N...which is said to supposedly make more males and less females. The light schedule isn't 100% exact either, and I have had no problems at all. If anything, it is a method for choosing the most healthy seeds.

(LOL, when I first started growing long ago, I thought all marijuana plants bud, not thinking about males because I never got them. I was underage then... I have gotten 1 male though Outdoor, this was the largest plant I ever grew.. It went for an entire season..very large.)