Horticulture is the branch of agriculture that deals with the art, science, technology and business of vegetable garden plant growing. It includes the cultivation of medicinal plants, fruits, vegetables, nuts, seeds, herbs, sprouts, mushrooms, algae, flowers, seaweeds and non-food crops such as grass and ornamental trees. It also includes plant conservation, landscape restoration, landscape and garden design, construction and maintenance and arboriculture. The application of their knowledge, skills and technologies used to grow intensively produced plants for human food and non-food uses and for personal or social needs. The aims of plant propagation are improving plant growth, yields, quality, nutritional value and resistance to insects, diseases, and environmental stresses.