Dr. Earth 831 Organic 10 Palm & Tropical Fertilizer, 25-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 Contains pro-biotic, seven champion strains of beneficial soil microbes plus ecto and endo mycorrhizae High in magnesium; stable and consistent plant growth, no growth spikes; 100-percent natural and organic Exceptional results because nutrients are released quickly; feeds for several months; consistent premium quality Eight select strains of ecto and endo mycorrhizae contribute to drought tolerance, enhanced nutrient availability and increased plant performance Provides optimum levels of essential plant nutrients; eliminates the need for chemical fertilizers when used as directed