The plants that have shapely growth and showy flowers or foliage or both are classified as ornamental trees. They are dealt in ornamental horticulture for three main purpose - (i) roadside plantation, (ii) planting in parks, large gardens and other public places, (iii) beautification of home gardens.

ROADSIDE PLANTATION
Planting trees along the roads and highways has been practised from ancient times in countries throughout the world. For good roadside planting, trees suitable for local ecological conditions should be selected. They should have spreading, dense, shapely crowns and preferably showy scented flowers. Fruit trees should be avoided as far as possible. To maintain uniformity a single species should be planted over a long stretch of road.

PLANTATION IN HOME GARDEN
Size and number of trees to be planted depend on the area of the garden. In home gardens, plants of colourful leaves, flowering trees are preferred, particularly those with colourful flowers blooming for a long time. A few tall trees may be planted at the back yard to act as a background for the building structure, provided enough land is available. Thick planting of trees not only disturbs the harmony and balance of the garden, it robs the inmates of free air and sunshine.