Go to radio shack for 10 buck they have a lighted hand held microscope, kind of small. You will want it on 30x, goes to 100x. Look close at a bud the cystals look like a golf ball on a golf tee. Awsome looking up close. When they are almost all cloudy not clear then they are ready to harvest. If they start to turn amber they are past there prime for THC. I don't know how many times Zandor has said that but would like to have a dime for every one. Hope this helps.