Martins Pea Straw Mulch is a soil conditioner that contains nitrogen and other nutrients for your soil. Pea Straw will break down over a period of months, which provides added and ongoing nutrition to your soil. This mulch is used as a protective barrier that assists in moisture retention, conditioning the soil and reducing weed growth. Pea Straw Mulch can be used for most types of mulching, including roses, garden meds, vegetable gardens, posts, trees, and shrubs. One bale will cover up to 7 square meters.