Bridgewell Agriculture PAR4® AFEPMBMEA31550B 3-15-0 Bone Meal 50 lbs - Bone meal has a great source of phosphorus and calcium with a long history of efficacy. It has long been recommended for flowering bulbs and root crops, such as carrots, parsnips, turnips and potatoes. The calcium levels in bone meal are essential for strong cell walls and root and shoot growth.