This should help you out.
http://boards.cannabis.com/grow-faqs...n-harvest.html
WeedyBoyWonder Reviewed by WeedyBoyWonder on . question for Tom on crystal colour hi Tom i like the idea of the crystals changing colour but i had no idea they did !!. so you know whats coming next What colour do they change to.? cheers for the reply. dragonbud:stoned::rastasmoke: Rating: 5