Need help, How far long are these

"Winter is comeing " seriously though this is my first grow so Im super nerves. I need help judging how close these are to harvest. The crystals are getting pretty clustered now. I know i should wait tell the hairs are 75% red, or purple... Will the be ready to harvest by the end of september?

Your kidding right? If you can give them a little potassium you will be one happy camper come the first week of October.
You got it good Casper. Keep it going.

A good month to go I'm sure.

i agree ^ a month at least.. save yourself from stress, get a loupe and check out the trichomes

Thanks for the input. I am definitely getting a Loupe, Iv actually have really wanted one for a while but I didn't know what they were called.