AmnZhzanswered grow question 5 years ago Hi, a couple of other factors that could assist you for when to harvest (I personally use microscope) are :
1) When the fan leaves are starting to die. As the plant finishes the fan leaves are yellowing and eventually dying
2) When the 90% of the pistils has turned orange/red.
But for me these factors indicate when to start checking the thc with a microscope. Hope was helpfull.