Feed your roses and bulbs the phosphorous and calcium they need to bloom and thrive. Nature's Guide bone meal is a natural source for these essential ingredients. Great for tulips, daffodils, calla-lillies, hyacinths, and other spring bulbs, as well as all types of roses. Use to correct phosphorous deficiencies the the soil. Bone meal also provides a natural non-manure source of 6% nitrogen. Apply once in the spring.