This industry comprises (1) establishments primarily engaged in providing landscape care and maintenance services and/or installing trees, shrubs, plants, lawns, or gardens and (2) establishments primarily engaged in providing these services along with the design of landscape plans and/or the construction (i.e., installation) of walkways, retaining walls, decks, fences, ponds, and similar structures. Installing artificial turf or in constructing (i.e., installing) walkways, retaining walls, decks, fences, ponds, or similar structures--are classified in Sector 23, Construction; Planning and designing the development of land areas for projects, such as parks and other recreational areas; airports; highways; hospitals; schools; land subdivisions; and commercial, industrial, and residential areas (without also installing trees, shrubs, plants, lawns/gardens, walkways, retaining walls, decks, and similar items or structures),--are classified in Industry 541320, Landscape Architectural Services; and Retailing landscaping materials and providing the installation and maintenance of these materials--are classified in Industry 444220, Nursery, Garden Center, and Farm Supply Stores.