I have a stubbon 82 year old grandfather with tons of clover patches in his yard. He has refused to let me spray them until last week. In the past he demanded that I let him spray his walmart bought junk on it. I decided to try speedzone on it cause I wasn't having good luck with trimec or monemtum. Within 36 hours the clover started to brown and were gone in about 4 days. Speedzone works like a champ on clover. I hope it works this fast everytime so the little old ladies won't call me back the next day and wanna know why the weeds aren't dead yet. The funny part is my grandpa took his half used bottle of spray junk back to walmart and demanded a refund and told them they needed to start selling the stuff I used. Believe it or not they gave him a refund for the half used bottle.