Mulch is a covering placed over the soil around your tomatoes. It's key step to take in effective tomato care.
It keeps moisture in. A layer spread over bare soil allows the area to soak up more water. The outer layer dries faster than the soil below it. That reduces the rate of evaporation from the soil, plus it lets the soil to retain moisture for your tomato plants.
It regulates soil temperature. In hot summer months, a layer helps keep the underlying soil cooler. In the fall when temperatures fall off, the layer around your tomato plants keep roots warm.
It smothers weeds. Fewer weeds sprout because seeds are buried beneath the surface. And the weeds that sprout are weak and easy to pull.
It prevents disease and fruit rot. A layer keeps water from splashing on the soil, absorbing bacteria and fungi, and bouncing up onto your plants. Likewise, when a tomato falls onto a layered area, it is less likely to rot quickly than if it falls onto soil.
It improves the soil. Organic varieties can be turned into the soil at the end of the season.

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