I used CGM a couple years ago. I applied 15 pounds per 1,000 square feet in mid Feb (we have a really early spring, here in San Antonio). I let it sit dry for three weeks until it rained. Results: Three weeks after it rained, my grass looked like it was on steroids. I could have mowed it twice a week but I resisted the urge. Color was deep dark green. I've never seen any fertilizer results anything like that. I did not notice any increase in density - my yard is in 90% shade so density is a problem here. I did not notice any decrease in weeds, but then again, I don't normally have summer weeds. At the time I thought I was applying it for the spring weeds, but I have learned since that the spring weed seeds sprout in the fall, so I was about 4 months late for that application. From what I've read, a good application rate to keep the weeds down is 30-40 pounds of CGM per 1,000 square feet. If I applied it at 15 #/ksqft, I can't imagine what would happen at 30-40 #/ksqft!!! Some places that application rate is affordable and some it is not. Ohio and Kentucky seem to have CGM for about $6/100 pounds. Look at feed stores and farmers' co-ops for the best prices.