Is it typical for the leaves to start changing colors and dying in or around the 4-5 week mark of 12 on 12 off flowering cycle? The buds all look really good however I am starting to get the curling and brown spotting on various leaves. So far I have cut most of the dying leaves off... not sure if that is a good idea. Been using the organic Earth Juice only as my nutrients. Temp is approx 80 degrees