Supervisors can advance to grounds manager or superintendent for a facility. These facilities include golf courses, other athletic facilities, cemeteries, campuses, and school systems. Supervisors can also advance to be the manager of a lawn maintenance firm. Many gardeners and groundskeepers become landscape contractors. Some states require licenses for people who apply pesticides.
Requirements vary by state.
In general, those who apply pesticides must be at least 18 years old and pass a written exam. Some states require that pesticide applicators take a training course of 16 hours or more. In most states, pesticide applicators must renew their licenses every three years. Workers may need to take courses in order to have their licenses renewed. Contact your State Department of Agriculture for specific information about pesticide licensing.