Best way to decide harvest is the trichome color. The seed banks 10 week thing is if your temps and humidity are all at optimum level. To check the trichomes your gonnna need a magnifier or a microscope. I got a 60x handheld microscope the one you look at stamps or coins with two little lights on it. Do a little research and decide what kinda buzz you want then when your trichomes are that color do you harvest