KushKilla... I'm real drunk and I'll even put the effort into telling you cuz it's so important. And I know a damn lot about pot. So I'm gonna tell you some shit and if you don't listen to it... well........ you're foolish.
Want to know EXACTLY when to chop them babes? Check the trichs. Really. Go to [[r adio Shack]], buy the 60-100x microscope for $10. Spend time with it, learn how to focus PROPERLY. You will see either CLEAR trichs (the ball on the stem), CLOUDY trichs, or AMBER trichs (trust me). If you want a more cerebral high, go cloudy, for a more stony, couchlock, high, go amber. There's plenty of pics online to show you the color of each.
Why look at the trichs? Because the trichomes are the glands that secrete resin which catches male pollen. That resin contains the main source of THC that you absorb when using marijuana. Fuck what the leaves look like, it's about the potency of the plant.
Trust me dude. That's how it goes and it's up to you. Oh... use at least 60x man.
PS - if it always looks the same to you (and you're really looking) then they PROBABLY ARE ALL THE SAME so wait a bit, patience is a virtue. Just wait until they ARE the color you WANT them to BE.
GANJA