labifleanswered grow question 6y ago Hey gardener! It's already great that you can check your trichomes because that's supposed to be the most reliable way to know when to harvest. You say they're clear and white, and to get the right effect, you need to wait until at least 90% of them are white to harvest and achieve the effect that the weed is supposed to give you. Otherwise, if you harvest too early, you'll get a little high, and if you harvest too late, you'll end up taking a big nap. Good luck to you, bella ciao!