While there are already existing domestic studies that found natural environments and gardening activities have a positive effect on the physical and mental capabilities of institutional residents, this study aims to discuss the effectiveness of healing gardens for treating behavioral problems in patients with mental disabilities. The goal of this study is to interview seven caregivers and assess the effectiveness of healing gardens in treating the emotional behavior of institutional residents though the responses received. The subjects of the study are 21 patients with severe mental disabilities, supervised by caregivers who also served as observers of the subjects' behavior between June 1st and July 15th. The subjects maintained their original daily schedules without receiving any additional treatment. This study will provide organizations working for the welfare of disabled patients with concrete suggestions concerning healing gardens and the emotional and behavioral problems of the patients they serve, based on the interview results collected from the seven caregivers.