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The national average lawn size is about one-fifth of an acre for the 85 million households with a private lawn. Estimated average lawn size varies from state to state, ranging from .06 acre in Washington, D.C., to .51 acre in Georgia, according to the Environmental Protection Agency's Office of Pesticide Programs.
On a scale of 1 to 14, a pH of 1 is very acidic and a pH of 14 is very alkaline, also called basic, while a pH reading of 7 would be neutral. Lawns grow best in a soil that is neutral to slightly acidic between a 6 and a 6.8 reading. Seemingly small changes in pH readings can mean big changes for lawn grass plants.