At present, horticulture is in the ascendant abroad. The so-called horticultural health preservation means cultivating sentiment, cultivating self-cultivation and preventing diseases by planting flowers, vegetables or fruit trees. For example, there is a hospital in San Francisco, USA, which has opened up an open space for some patients with chronic diseases to plant flowers and vegetables; In a nursing home in Australia, according to the different symptoms of patients, they are also required to do manual labor such as pulling weeds, pruning, fertilizing, loosening soil and watering fields. Practice has proved that these patients recover quickly. There is also a sanatorium in Japan, which integrates psychotherapy and psychological adjustment, allowing patients to take medicine in light music and engage in gardening activities such as pulling weeds, catching insects, watering and pollinating.

Horticultural health care is a unique therapy. It mainly treats diseases through a series of activities such as planting flowers, grass, vegetables and fruit trees. While planting flowers and plants, we also smell the flowers. Therefore, it can be said that gardening regimen is a therapy with fragrance. In the street park, loosen the soil and weed, or water the flowers and trees and watch all kinds of flowers. All this will give people great spiritual comfort. Medical scientists have confirmed that horticultural therapy can promote the improvement of diseases mainly by regulating the disorder of central nervous system excitement and inhibition. For example, patients with various chronic diseases often have anxiety and depression. By planting flowers and trees, we will have a sense of pride and masturbation when we see the flowers and trees we cultivate grow sturdily day by day, thus enhancing our courage to overcome diseases and create a better life. Patients with mental and nervous system diseases have always been difficult to get along with others. By planting these living plants, they took the first step to adapt to society and promoted the recovery of their bodies.

Furthermore, many flowers and trees can absorb toxic gases in the air and expel oxygen. In addition to forest and tree areas, places with many flowers and plants are also places with many negative ions, and of course it is also a good place for air negative ion therapy. Horticultural therapy can be used as an auxiliary treatment for many diseases, which is most suitable for the elderly.

Indications of horticultural therapy include: hypotension, essential hypertension, gastric and duodenal ulcer, ulcerative colitis, habitual constipation, tuberculosis, tension headache, transceiving spasm, amblyopia, climacteric syndrome, depression, schizophrenia, etc.