Natural source of organic Nitrogen and Phosphorus100% pure, no additives or fillersFor bulbs and all perennials Espoma Bone Meal is an all natural organic source of Nitrogen and Phosphorus. Bone Meal helps develop sturdy root systems and promotes plant growth and is ideal as a supplement for bulbs, flowers and roses. 1 lb. equals 2.25 cups of all natural fertilizer.All natural source of organic nitrogen and phosphorusDomestic bone meal is 100% pureNo additives or fillersFor bulbs and all perennials at planting timeNPK ratio: 4:12:0