Fertilizers, plant growth regulators and some pesticides may be applied to the soil at the root basal for systemic uptake. Basal drench is a rudimentary method of applying these materials and can sometimes be done by the homeowner, such as with an application of imidacloprid to treat smaller Ash trees for EAB control. However, the preferred method of application when absorption through the root system is necessary is by soil injection. Our specialized equipment delivers the material directly to the tree's feeder roots at 8-12" below the soil surface, where research has shown the most uptake of water occurs. The benefit is the assurance that the tree uses as much of the added materials as possible with minimal off target delivery, maximizing your value with the least environmental impact possible.