E.B. Stone Organics Blood Meal is a long lasting source of natural organic nitrogen which is readily available to plants. It is ideal for use on most garden plants to encourage growth and improve leaf color. It is suitable for use on fast growing plants throughout the garden including vegetables, perennials, annuals, roses, shrubs and trees. Our product may be used as a nitrogen source in compost piles. This product is 100% natural and organic. NPK: 13-0-0 Derived from: Blood Meal. Contains: Nitrogen.