you've got to look at the condition of the bud. Its mostly preference though. Harvest when most of the pistils are white then you are a bit early. Harvest when more or less 1/2 of the Pistils have oranged and receeded you'll get a more potent head n body high. If you let that sucker mature until all or most of the pistils are oranging off, then youll get more of the body high and more flavor from terpenes. Also depends on strain. If you post a pic it would make it easier to say if ur buds are filled out or not.