Primary benefit of this pleasant smelling mulch is increasing organic matter, although it is also a valuable plant-derived fertiliser. Has a minimum of 15% protein, which is the equivalent of 2.4% Nitrogen. Also contains trace minerals and triaconatol (a natural growth hormone). Excellent addition to the compost pile for nitrogen content and absorbency. Roses respond especially well to alfalfa mulch. Spread a layer about 2cm thick in spring and in the middle of summer.