Sandy and silty clay loams are not ideal growing platforms. If your foundation is predominately clay, it is advisable to add organic material to make the soil more permeable. A high-quality topsoil can then be spread 4 inches thick and tilled into your subsoil.
About this Author
Based in Rhode Island, Cindy Dixon has been writing since 1995. Her articles appear in “Weeder's Weekly” magazine and design journals. Dixon previously served as an editor for a international parenting site and was a copywriter for a Fortune 500 company. She holds a Bachelor of Arts in graphic design from Rhode Island College.