Hi, I’ve read your article stating that adding sand to clay is a bad idea.  Recently, I came across advice about adding gravel to clay to improve the drainage, as described below, do you have thoughts on that?

 

I live in a Mediterranean climate. Topping a lawn with gravel in a Mediterranean climate is not a good idea. You can, however, top the low spots on a lawn with sand, then level the sand and let the lawn grow up through.  This can be done year after year after cutting the grass short in spring. In this case, sand and clay are not mixed together. Sand is used as a layer on top. This is often done with golf courses, particularly those with Bermudagrass.