When used before they attack, ferti-lome Tree & Shrub Systemic Insect Drench will prevent many insects all season long on non-edible trees, shrubs, and ornamental plants. We recommend using it every spring. Simply mix with water and pour it under the plant's dripline. It moves down through the soil and is absorbed by the plant's roots for protection on old and new growth, all season long. 32 fl. oz. bottle.