Expert Gardener All Purpose Plant Food 16-16-16 Fertilizer 20lb., is a balanced fertilizer for use on trees, shrubs, flowers, and vegetable gardens. Expert Gardener All Purpose Fertilizer is formulated for quick release for beautiful foliage, more vegetables and root growth. When using on flowers and vegetables spread Expert Gardener All Purpose Fertilizer 16-16-16 evenly on the bed surface and work into the top 2 to 4 inches of soil surface before planting. For vigorous growth, repeat application every 6 weeks during the growing season working into the soil surface along rows or around plants.