Use of Mulches

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1. Use a deep layer of mulch in planting beds to help retain moisture, slow weed growth, and prevent erosion.

The use of mulches on sloped areas along with terracing and plantings can help prevent runoff and erosion problems.

Examples of organic mulch material include:

shredded bark
wood chips
pine needles
straw
pecan hulls
cotton seed hull
composted leaves
shredded cedar.

The depth of mulch needed will depend on the type used. As a general rule, the coarser the material, the deeper it should be applied. A 3 to 4 inch layer of bark mulch should be sufficient. Mulch needs to be reapplied as it decomposes.

2. Use inorganic mulches such as pea gravel, crushed granite or pebbles in unplanted areas.

Such areas can become inexpensive pathways, utility areas, or decorative border strips.

Don't use stone mulches in areas immediately adjacent to buildings, as they can heat up and cause glare.

Medium colored stone, such as beige or light grey, is preferred over white, which causes glare, or black, which absorbs heat.

3. Use mulches from locally or regionally derived materials.

This decreases transportation costs, and utilizes local resources.

Organic mulches can be the byproduct of local Christmas tree recycling, tree trimming, land clearing, or sawmills.

Stone mulches can be produced from regional quarries.

Check with the supplier to determine the source of organic and inorganic mulches.

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Sustainable Building Sourcebook web version copyright Sustainable Sources 1994-1999.