According to the American Horticultural Therapy Association, it is "a process utilizing plants and horticultural activities to improve social, educational, psychological, and physical adjustments of persons thus improving their body, mind, and spirit."
美國園藝治療學會的定義是，透過園藝治療師的設計與指導，利用花、果、蔬菜和香草等植物的栽種和花藝活動，來增進人們的社會、心理、生理和智能等機能。