The Ragan & Massey Tree & Shrub Drench (1.47% Imidacloprid) is a systemic insecticide designed for outdoor trees and shrubs. Here are the general directions for use: Preparation: Measure the circumference of the tree trunk at chest height or the height of the shrub. Use 1 ounce of the product per inch of trunk circumference or shrub height. Mixing: Dilute the measured amount of the product in water as per the label instructions. Application: Slowly pour the solution around the base of the tree or shrub, ensuring even distribution. Avoid applying to waterlogged or frozen soil. Timing: Apply when the soil is moist but not saturated. For best results, water the tree or shrub the night before application. Precautions: Do not apply to linden, basswood, or other Tilia species. Avoid application during blooming periods if bees are foraging.