Abstract: An automatic height control system and method for a leaf vacuum collection hose nozzle are provided. At least one surface proximity sensor provides information to a controller indicating the height of the nozzle above the surface. The controller compares that information to a preset or user defined desired height and commands the leaf vacuum swing arm boom carrying the collection hose to raise or lower the nozzle to achieve the desired height. The surface detected by the sensor may be the top surface of the leaves to be collected or the ground on which the leaves are piled based on the type of sensor used. The controller coordinates the speed of sweep of the nozzle to ensure that the nozzle can be raised or lowered to avoid contacting upsloping ground or other taller structure and to avoid sustained operation at an inefficient height over down sloping ground.