Mulch is primarily used for providing a uniform or decorative look to the garden, for soil improvement along with plant growth and protection. It prevents the loss of moisture due to evaporation whilst assisting in keeping the soil insulated at a balanced temperature thus improving the conditions for plants root balls. Mulching prevents crusting of the soil surface, improves soil absorption and can assist in reducing erosion. Organic mulches naturally break down, and improve soil structure with healthy microbial activity that in turn feeds vital nutrients to the soil and plants. When applied deeply (at least 100mm), mulch can also assist in suppressing weed.