Grow#3

You will see signs of yellowing when you've depleted nutrients and basically deprived your plants of nutrients. It's not necessary and occurs more often growing organically I find. If you look at many Master Growers on here you'll rarely this occurrence because it's not necessary. What really counts and is important is to make sure you have very little nutrients/minerals in your flowers to have a cleaner and safer product for consumption hence a proper flush.