Espoma Tomato-tone 3-4-6 Tomato & Vegetable Food is a premium plant food formulated specifically for growing plump and juicy tomatoes. Tomato-tone's organic composition feeds your plants naturally and will not force rapid growth at the expense of blooms and tomato yield. Tomato-tone's all natural formula contains Bio-tone®, a proprietary blend of beneficial microbes. Bio-tone biologically enhances natural plant food to ensure superior plant growth.