Espoma Organic Tree-Tone All-Natural Tree Food, 6-3-2, 18 lb. is a premium organic fertilizer formulated specifically for shade, fruit, and ornamental trees. It contains Bio-tone, a proprietary blend of beneficial microbes that biologically enhances the natural organic fertilizer to ensure great plant growth. The natural organics in Tree-Tone break down gradually to provide a long-lasting nutrient reservoir to feed the entire tree - leaves, trunk, and roots.