color of the trichomes is the only true test for harvest. pistils change color whenever they want, mine turned brown weeks before I harvested by following the change in the trichomes. 30-60X pocket microscope (with built-in light) is best. Go by the average color of the trichs, over the whole plant, top, bottom, middle. I sniped very, very small samples from the bud leaves and placed them on a white paper plate for viewing, at least three samples per plant.

Hope this helps....enjoy.
Dutch Pimp Reviewed by Dutch Pimp on . JUST BEEN LOOKING AT MY TRICHS I was looking through a 4x mag glass which was the only one in the town ,£7.99 I WAS RIPPED I RECKON. Anyway they looked clear but most of the pistols have changed colour and as they are blueberry i was hoping they would get a few shades of purple on them.THEY LOOK VERY FROSTY THOUGH.:D:smokin: My question, is there anyway of judging the plants by the pistols as well cos i dont think that glass is powerfull enough (what a bummer).was reading a grow log and it said go for 80% -20% Rating: 5