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. Cross-References. Establishments primarily engaged in-- ? 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.