Bulb-tone is a premium fertilizer formulated specifically for bulbs and tubers. It contains bone meal and other natural organics to meet the special nutritional needs of these plants. Bulb-tone’s all natural formula contains Bio-tone®, our proprietary blend of beneficial microbes. Bio-tone biologically enhances our natural fertilizer to ensure superior plant growth. Bulb-tone feeds slowly, safely, and will provide a long lasting nutrient reservoir to ensure superior results.