Dalam arsitektur lansekap, bentuk dan penempatan tanaman hias menjadi pertimbangan yang penting. Isu lainnya yang penting dalam tanaman hias adalah habitat alami yang disukai tumbuhan tersebut serta bentuk tajuk yang dimilikinya. Dalam pengertian ini, tanaman hias dapat mencakup pula tanaman tepi jalan serta tanaman penaung (di ruang terbuka).
Karena tanaman hias dikelompokkan berdasarkan fungsinya, tidak menutup kemungkinan bahwa suatu tanaman sayuran, tanaman obat, atau tanaman buah menjadi tanaman hias, atau sebaliknya.
Ornamental plants include all plants, well-shaped herb, vines, bushes, shrubs, or trees, planted to people as a component of parks, home gardens, decorating the room, the ceremony, the component makeup / fashion, or as a component of a wreath. Cut flowers can also be included as an ornamental plant. In a general context, ornamental plants is one of the groupings based on the function of horticultural crops. The part that is used by people not only interest, but the impression of the beauty that is raised by this plant. In addition to flower (color and flavor), leaves, fruits, stems, bark and even can be utilized components. For example, some plants that emit twigs fresh scent can be placed in the room to scent a room can make it as houseplants.
In landscape architecture, shape and placement of ornamental plants are important considerations. Other issues that are important in ornamental plants is the preferred natural habitat of the plant as well as its crown shape. In this sense, ornamental plants may also include roadside plants and shade plants (in open space).
Because the ornamental plants grouped by function, it is possible that a crop of vegetables, herbs, fruit or plants into ornamental plants, or vice versa.