Bulb-tone is a premium plant food 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 all natural formula contains Bio-tone, the proprietary blend of beneficial microbes. Bio-tone biologically enhances the natural plant food to ensure superior plant growth. Bulb-tone feeds slowly, safely and will provide a long lasting food reservoir to ensure superior results.