Abstract: An apparatus and method for aerial chemical trimming of vegetation, the apparatus including an elongated boom suspended from an aircraft, a plurality of nozzles aligned vertically along one side of the boom, and a reservoir and pump coupled to a lower end of the boom for supplying an herbicide through the boom to the plurality of nozzles. In use, the boom is positioned alongside a row of vegetation to be trimmed and the herbicide is pumped from the reservoir, through the boom, to the nozzles and sprayed directly onto the vegetation. The boom is then moved along the row of vegetation.