This competency-based horticulture curriculum guide is designed to provide secondary and postsecondary horticulture teachers with a task-oriented program in gardening/groundskeeping. It contains a master resource list, a listing of gardening/groundskeeping resources available from various states, and 87 competency task sheets organized into 10 competency areas. These areas are equipment operation and maintenance; equipment and supplies; soils; fertilizers; lawns; trees, shrubs, annuals, and perennials; pesticides; maintenance of facilities; management/job actions; and personnel management. A task statement, a performance objective, suggested learning activities, evaluation procedures, selected resources, and a performance guide are provided in each competency task sheet. Instructor check lists designed to help instructors determine acceptable levels of student performance are also included in the units. (Related competency-based horticulture curriculum guides in the areas of floriculture and turfgrass maintenance are available separately through ERIC--see note.) (MN)