1. Water retention - mulching plants is an effective way to hold available moisture in the root zone, which in turn helps in conserving water and reduces the amount and frequency of necessary watering.
2. Moderation of soil temperature - keeps soil cooler in summer and warmer in winter to help avoid extremes in soil temperature change.
3. Weed growth prevention - reduces frequency of weeding and when weeds sprout, makes it easier to pull them.
4. Soil Conditioning - prevents erosion or soil compaction. Decayed organic mulches add to soil nutrients and help acidify soil pH.
5. Appearance - mulching provides an attractive, finished look to any landscaped area and often provides a background to display plant features.