Dr. Earth 720 Alfalfa Meal 2-1-2 Boxed, 3-Pound Acts quickly because it decomposes fast Excellent for roses because it contains magnesium which your roses love Use on roses, trees, annuals, perennials, vegetable gardens, shrubs, and tropical plants Infused with seven strains of beneficial soil microbes Acts quickly because it decomposes fast Excellent for roses because it contains available magnesium Excellent all around source of organic nutrients 2-1-2 formulation