Organic mulch will also help with water retention, weed prevention, and will protect plant roots. Organic mulches won't, however, protect from pests.
[header] How to apply mulch [title] Select an organic mulch to add nutrients to your lawn. [step] Organic mulches include wood chips, straw, grass clippings, chopped leaves, and compost. When the mulch breaks down, it naturally adds nutrients to the underlying soil.