Dry peat moss requires considerable time and water to become moist, so it should be applied only to a 3-inch or less depth and avoided in areas subject to drought. Its acidic pH makes it especially desirable for acid-loving plants. These have an esthetic appeal and are not prone to forming a soggy mat as are leaves. They are especially good for acid-loving plants. This is one of the few mulches that is readily available and economical enough to be used on larger-scale commercial applications.
Polyethylene allows passage of gases such as nitrogen, oxygen, and carbon dioxide.
Holes or slits facilitate the planting of seeds or plants and water entry. It can last several years if undamaged by machinery. Usually, it is used as black film. Earlier crops can be produced with the clear, and to a lesser degree, black plastic mulch because of the warming of the soil. These materials are lightweight and easy to apply, but their appearance restricts their application mostly to vegetable gardens.