The increasing number of elderly people has created a greater need for maintaining not only physical health but also psychological well-being. Older adults often experience biological and social changes that can trigger stress, loneliness, and a decline in mental health. Therefore, simple and accessible approaches are needed to support their psychological condition. This study aims to examine the role of green plants in home yards as a psychological resource that can support the mental well-being of the elderly. The research uses a literature review method by analyzing various scientific articles, academic books, and research reports related to elderly mental health, green spaces, and human interaction with plants. The findings indicate that the presence of green plants provides several psychological benefits, including reducing stress, alleviating loneliness, improving mood, and creating meaningful activities through gardening. Activities such as planting, watering, and caring for plants can also enhance a sense of responsibility, self-esteem, and opportunities for social interaction with family members and the surrounding community. However, the optimization of these benefits is influenced by several factors, including the level of elderly participation, the accessibility and design of the yard, the selection of easy-to-maintain plants, social support, and the individual health condition of the elderly. Thus, the utilization of green plants in home yards can be considered a simple, affordable, and environmentally based strategy to support mental health and promote healthy and active aging among older adults.