园艺疗法已被证明在改善失智老人的行为障碍和精神症状方面有显著潜力，但多数研究的干预时间较短，疗效难以持久。为探究园艺疗法的长期效果和可食地景的恢复效益，开发了以可食地景为蓝本的长期高频度园艺疗法程序，选取 35 名长期居住于浙江省杭州市某医养结合机构的失智老人为研究对象，对其进行系统干预和追踪观察。研究发现：失智老人的认知能力在园艺疗法实施期间无显著衰退，行为障碍和激越行为发生频率均显著降低。可见长期实施可食地景园艺疗法显著改善了失智老人的生活质量、行为障碍和精神症状，对增强失智老人的自我效能感和社交互动能力有良好的效果，且疗效持续时间较长。

Horticultural therapy has shown significant potential in improving behavioral disturbances and psychological symptoms in dementia patients. However, the relationship between intervention duration, methods, plant types, and therapeutic benefits remains unclear. The study was conducted at the Pension Institution in Hangzhou, Zhejiang Province. Through the innovative horticultural therapy program based on edible landscapes, thirtyfive long-term resident demented elderly participated in the study, ystematic intervention and follow-up observation. The results showed that the cognitive ability of the dementia patients remained stable during the pause. And the frequency of behavioral disorders and agitated behaviours significantly decreased. The results unveiled long-term, high-frequency horticultural therapy based on edible landscapes significantly improves the quality of life, behavioral disturbances and emotional symptoms in dementia patients. Participants demonstrated increased engagement and self-efficacy, with lasting effects.

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