Hey BK.. your every where..lol.. alright.. please educate me on this. I've only had a few grows. And am told and have read that yellowing of leaves is perfectly normal. For example...
"During the flowering stage,
cannabis plants will and should lose some of their pigmentation. Generally, cannabis growers don’t need to worry about yellowing leaves on the lower section of the plant during the later weeks of flowering. However, if the yellowing is happening during the vegetative stage or in the first few weeks of flowering, an examination of the environmental conditions (temperature), the pH of the solution and/or medium, and the nutrient concentration will lead the horticulturist to the cause of the discoloration" -Maximum Yield
"Whenever you see yellow leaves on your marijuana plants, the first step is not to panic. Yellow leaves are not always a death sentence. Sometimes, the leaves turn yellow for no particular reason, even though there’s no harm to your plant". - Way of Leaf
"Sometimes, growers don’t need to worry about yellow leaves. At times, they are merely a natural part of the growing cycle. Cannabis plants often shed older fan leaves (especially at the end of their life), which turn yellow before falling to the ground. During the flowering phase, plants divert most of their energy towards the flowers, which also tends to cause slight yellowing of the leaves". - Royalqueenseeds
Now this is assuming nothings wrong with the plant, yes, I get that part. pH, watering, over/under feralization, etc... but.. doesn't nature play a part too?