usually 1 or 2 40lbs. bags will condition 10/15 square feet of your soil down 4 inches deep... if your husband has a rear tiller for his tractor ,spread it out and work into the soil , if not a regular tiller will do (just more work) :) it has a fert rating of 1-1-1..mostly used as a conditioner , when you plant side dress with some plant food of your choice..