Horticulture is the part of agriculture that deals with the art, science, technology, and business involved in plant cultivation. It is practiced from the individual level in a pot or jar up to the activities of a multinational corporation. It is very diverse in its activities, incorporating plants for food and medicine (fruits, vegetables, nuts, seeds, herbs, sprouts, mushrooms, algae, flowers, seaweeds) and non-food crops such as grass and ornamental trees and plants. It also includes related services in plant conservation, landscape restoration, landscape and garden design/construction/maintenance, arboriculture, horticultural therapy, and much more. This range of food, medicinal, environmental, and social products and services are all fundamental to developing and maintaining human health and well-being.
Horticulturists apply their knowledge, skills, and technologies used to grow intensively produced plants for human food and non-food uses and for personal or social needs. Their work involves plant propagation and cultivation with the aim of improving plant growth, yields, quality, nutritional value, and resistance to insects, diseases, and environmental stresses. They work as gardeners, growers, therapists, designers, and technical advisors in the food and non-food sectors of horticulture.
For Further information refer to http://pir.sa.gov.au/primary_industry/horticulture