Martins Organic Pea Straw Mulch is 100% pea straw, compressed tightly into a bale. Pea Straw is a soil conditioner adding extra nitrogen and nutirents to your soil as it breaks down, for many months after application. Many farmers grow peas as a rotational crop to add nitrogen direct into the soil, as peas are a nitrogen fixing plant. Provides nutrients for your garden Conserves moisture Natural way to suppress weeds Martins Organic Pea Straw Mulch can be used for all types of mulching, including roses, garden beds, vegetable gardens, pots, trees and shrubs. This mulch is used as a protective barrier that assists in moisture retention, conditioning the soil and reducing weed growth. It will break down over time, adding organic matter to the soil. Size Compressed - covers up to 7m2