P 20% - Ca 20%. This is not standard bone meal; this is the high quality steamed bone meal. This premium grade material is the finest, richest we've ever tested. Lowest fat content available, virtually fat-free. It's an excellent source of immediate and long-term releases of phosphorous, calcium and trace elements. Great for bulbs and all flowering and fruiting plants and trees. Use from 5-10 lbs per 100 sq ft. Work into soil prior to planting. 5 lb minimum order.