The majority of your hairs are still white, so I'd say those girls are still pushin; the last one is definitely getting close though. You're looking for about 75% brown hairs and a honey golden tint to the trichomes. Looks to me like you're still getting good thc formation, but once they start to turn they'll degrade pretty fast. Take em before all your hairs start to brown up, but not before the triches turn. Its a tough decision to make, but I think guys tend to wait too long more often than cutting early. I'd say you've got about a 4-7 days to go, maybe a little sooner on that last one. Of course, you don't have to cut them all at the same time. Now, if these are outdoors it changes things a little. You don't wanna let em sit in the rain for a long time right before you cut, so look for window of good weather. But you also dont wanna leave em out there to get snatched - seen it happen a number of times to the least expecting growers. hope this helps a little bit.
