I have never spread rock before but I have a subdivision that is using it more and more instead of mulch. I have to give a bid Thursday and I don't know a labor charge yet. How long does it take to spread a yard of rock verses mulch. With mulch I have priced it out for 5 yards and 3.5 hrs labor. I know rock will take longer to smooth than mulch. Any one have any estimates, will it take 15 minutes per yard longer, maybe 30 minutes. Should I figure a yard a hour. Just not sure. I will be shoveling out of my dump trailer and wheelbarrow to back yard.