When to harvest?!?!?!?! HELP :)

I have a Pandora auto going right now. She is at day 84! This is my first grow so I'm not sure as to when she will be ready?!?! I also have a Pakistan Ryder that is about 3 weeks old right now and I'm pretty sure the hairs mean shes a female but shes showing a lot sooner than my Pandora did! Pandora has been through some rough stuff! She was too close to the light so she is really short and stunted. She was over watered, dealt with a mild case of mold, has moved environments twice now and is growing under only 4 cfls. I'm not expecting much out of her but I do want to know for future reference when is a good time to chop them down.

if youre going off of hairs you should harvest when about half are red but if you have a way to look at the triches like a magnifying glass look to see almost all milky and some amber

First off! I recommend at LEAST a 400 watter. Cfls wont do much at all and is a
waste of time and a God given gift. Don't be cheap.. spend the 100 on the bulb spend the 200 on the ballast. If you refuse that advice I leave you with this.... go to radio shack, buy a 60-100x microscope. 12.99. A more milky trichrome will give more of a head high where as a ambered trichrome will give you couch lock. I personally choose a 50/50 mix.

With lighting, id buy a 400 Watt mH and a 600 Watt hps. You could go vertical with these for a bit more in price though I prefer a hood with my lights so I can control lighting more. But as a serious grower, dont waste time with Cfls, less you built a board of 30 or more. If you buy what I recommend, your first yeild will more than pay for itself.

Also, you'd pick between 9 and 12 weeks depending on strain, hence the microscope. Good luck. Let me know how they do! Pics when finnished please!