idk man. my friend told me that he had a plant, the hairs went compelty red. then they turned white again then caem back. actually, for ripe ness, and harvest, you dont look at the hairs. alot of poeple think this but no its not true. you have to look at trichomes. trichomes are the crystals, and the only way to really see if the buds are ripe is to have a magnifying glass and look at the trichomes. i would say like once 60-70% of the trichomes are brown. it is time to harvest. should be at around 7-9 weeks. usually.