Mulch

**1. Uses and Benefits of Mulch:**
– Mulches retain soil moisture and regulate soil temperature.
– They suppress weed growth and enhance aesthetics.
– Applied on soil surface, around trees, flower beds, paths, and in production areas.
– Mulch layers are typically 2 inches or more deep.
– Effects of mulches in temperate climates depend on application time.

**2. Types of Mulch Materials:**
– Organic residues like grass clippings, leaves, hay, and straw are commonly used.
– Compost is utilized to avoid phytotoxicity issues.
– Rubber mulch is made from recycled tire rubber.
– Plastic mulch is predominant in large-scale vegetable growing.
– Other materials include rock, gravel, wood chips, bark chips, peat moss, straw, pine straw, and colored mulches.

**3. Organic Mulches Characteristics:**
– Organic mulches decay over time and are temporary.
– Decomposition affects their usefulness.
– Some organic mulches negatively affect plant growth due to carbon to nitrogen ratio.
– Care must be taken with wood mulch to prevent termite issues.
– Organic mulches can block water and air flow between soil and atmosphere.

**4. Mulch Safety and Concerns:**
– Safety concerns about colored mulches.
– Anaerobic (sour) mulch potential risks highlighted.
– Brandsaeter et al. 1998 study referenced.
– Salt and baking soda toxicity levels compared.
– Mulch colorants safety debated.

**5. Production and Maintenance of Mulch:**
– Groundcovers (living mulches) slow weed development.
– On-site production reduces the need for importing mulch materials.
– Mulch gardens should be sited close to growing areas.
– Mulch renewal methods include spray for color renewal.
– Additional resources for mulch and soil FAQs provided.

Mulch (Wikipedia)

For the community in the United States, see Mulch, Virginia.

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A mulch is a layer of material applied to the surface of soil. Reasons for applying mulch include conservation of soil moisture, improving fertility and health of the soil, reducing weed growth, and enhancing the visual appeal of the area.

A mulch is usually, but not exclusively, organic in nature. It may be permanent (e.g. plastic sheeting) or temporary (e.g. bark chips). It may be applied to bare soil or around existing plants. Mulches of manure and compost will be incorporated naturally into the soil by the activity of worms and other organisms. The process is used both in commercial crop production and in gardening, and when applied correctly, can improve soil productivity.

Living mulches include moss lawns and other ground covers.