LAWN DECOMPOSED GRANITE SOIL - Knowledgebase Question

Lake Elsinore, Ca
Question by weldonet25
May 16, 2009
We have a large lawn with very hard DECOMPOSED GRANITE SOIL in Lake Elsinore, CA about 80 miles E. of Los Angeles. I tried a search of your database but there were no results.
Since moving into our new home here in 2003, we have had continuing problems with our Tall Fescue grass dying. We suspect this is due to the soil, since some of our neighbors have the same problem. Some of them have remo


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Answer from NGA
May 16, 2009

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I think a little renovation is needed. Your soil just isn't suitable for turfgrass so I would seriously consider renting an aerator and applying some organic matter so the roots have somewhere to go for nourishment. A core aerator will remove one inch by three inch plugs from the lawn. Leave the plugs on the lawn and they will dissolve in rain or water from the sprinklers. After aerating spread a thin layer of sand or compost over the area and water it in well. The sand or compost plus the soil from the plugs will work their way down into the holes left by the plugs. You can then allow the fescue to spread and cover the holes or you can overseed your entire lawn. Either approach should improve the soil beneath the lawn and help your lawn grow lush and thick.

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