i would cut the lights back to like 11/13 or 10/14 for the yellow leaves, maybe a small dose of nitrogen, be careful not to put too much though cause it can slow bud growth but it should help your yellow leaves.
DrGr33nthum Reviewed by DrGr33nthum on . Help ! When to harvest ? The plant is 4weeks + into flowering . The light is at 13/11. In a microscope the trichomes look mostly cloudy or about 60/40 but pistil hairs seem still fresh and white. Older leaves and big fans are yellowing and falling off and even turning brown. No nutes . Any ideas?? Rating: 5