Having a thick canopy but a sparse undersection is a problem with many strains, since they don't grow as tall (typically) which provides for a thick canopy but not much else. You can try the partial harvest, but that is usually an attempt to prevent this from happening and results in bigger buds being picked too early and the small buds not showing too much additional growth either. Selectively picking off the larger fan leaves and allowing more light to reach the bud sites is the easiest way to increase your yield, as is side lighting for taller plants. Just don't go crazy and pick off too many leaves, as it can stunt the plant. I usually remove the two or four topmost leaves on my colas, as the direct light exposure triggers the growth under the bud's end, making it a little fatter. Keep up the good work!!
