Yeah, they definitely take longer to finish. 15-16 weeks of flower my last grow. I'm currently in week 7 of flower and just a few pistils have turned brown and still all clear trichs. I've also gathered that you can't reliably determine harvest time by checking for amber trichs. I seemed to have 5-10% amber trichs for a good 2 weeks and they stayed that way until I just couldn't bear to wait any longer and chopped em'. Great smoke.

So Weez,? How do we determine when to harvest under LEDs? Aside from the obvious... growing the same strain out a few times to guage it. :smokin:
Joefarmer Reviewed by Joefarmer on . LED grow lights... input please. Hello guys, I'm exchanging eMails with a representative from a LED company. I asked him if they could produce a custom light for growing, and here's what he told me: Our options are as follow: 940nm, 850nm, 660nm, 630nm, 610nm, 590nm 570nm, 530nm, 510nm, 470nm, 460nm, 400nm and a total of 64 LEDs in the bulb. Rating: 5