when is the right time too harvest?

[yekomS]

most of the plants have 1/3 of red hairs. some more developed than others. when is the best time too harvest?

[Rusty Trichome]

when is the best time too harvest?
Just before you run out of smoke. :jointsmile:

The pistols (hairs) aren't used as an indicator for maturity. Check the trichomes. (the waxy liquid that oozes from the leaves)
Try not to harvest too early. Yield will suffer. When most of the trichomes turn milky you'll likely want to start thinking of harvesting. If you let them go past the milky stage, they start turning amber or rust colored.
Radio Shack has a tiny 100x pocket microscope for around $10.00 or so. Works great.

As a general rule,
milky trichomes - a lighter "up" buzz
rusty trichomes - a heavier "I've fallen and can't reach my munchies" buzz.

[Revanche21]

Like Rusty said, its not a good indicator by hair
but if you absolutely don't want to get a microscope you can do it when 80-95% of the hairs are red/orange/brown