These plants include ornamental shrubs and trees, bulb crops such as tulips, herbaceous perennials, and roses. Since these plants are usually partially grown when they are sold, provisions must be made for transporting them in viable condition. With trees and shrubs the ball of soil surrounding their roots is removed with the roots and wrapped in burlap. Smaller plants may be sold in pots. Production of turf grass has become a major specialised industry.
Landscape design is a distinct profession, only a portion of which involves horticulture.
In its broadest sense it is concerned with all aspects of human use of land. The landscape architect uses growing plants as one element in creating an attractive and functional outdoor area. Anyone with a smallgreen house can raise seeds into healthy plants, or even on a kitchen windowsill seeds can flourish.