so are you going to lie to everyone and tell them it's purple grandad. this sounds like unfair buisness practice. good thing i only purchase my weed from a REPUTABLE source.
oh, and yes it does work. trim off a branch and leave it in a cup with 1/4" of food coloring in the bottom. i put mine in the fridge overnight. the next day i had blue weed, orange weed, red weed and yellow weed. didn't you ever die a flower as a kid?