Seeding a lawn over existing driveway of class 2 fill - Knowledgebase Question

East Bethel, Mi
Question by lskjm
February 24, 2010
We want to seed a lawn over an exiting driveway (we don't use the driveway) that is covered with class 2 fill. What do we need to do to prepare the ground? Can we place top soil and compost over the fill, or do we need to remove the fill. If we need to remove, how do we do this? Thanks for your help.


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Answer from NGA
February 24, 2010

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The answer really depends upon whether or not the driveway was used extensively in the past. If so, the soil may be quite compacted which will make it difficult for the roots of the lawn to penetrate deeply. While grass will still grow in shallow soil, you'll need to water more frequently than if the turf had 8-12 inches of soil in which to establish. The only other concern is whether or not auto fluids dripped into the area. If so, the oil/gasoline, etc. might inhibit the growth of the turf. You may not need to remove the fill but you might want to rototill it up to loosen it to a depth of 10-12 inches, then spread topsoil over it and rototill again. This should mix the two soil types enough to provide good drainage. If after rototilling in some topsoil the area still looks rocky, you may need to level it and spread another 4-6" of topsoil over the top prior to planting. Best wishes with your lawn!

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