Lilly Miller blends natural ingredients with traditional plant foods to produce a unique fertilizer that provides nitrogen from 4 different sources. We've added a mix of nutrients that are available to the plants quickly to help get them off to a great start and other nutrients that last longer to keep on feeding bulbs steadily for over 4 weeks. Bulb & Bloom Food also adds extra minerals, so plants are never hungry for these essential elements. 4-10-10 formulation. 4 lb. box.