The article reviews the role of Flavobacterium species in improving plant health, highlighting their ecological niche, functional roles, and molecular mechanisms. Flavobacterium, a genus within the phylum Bacteroidota, has been recognized for its diverse habitats, including aquatic and terrestrial environments, and its potential benefits to plants. The review discusses how Flavobacterium species contribute to plant growth promotion, disease control, and tolerance to abiotic stress. It also explores the production of volatile organic compounds (VOCs), nutrient sources, and plant hormone-mimicking compounds by Flavobacterium species, which play crucial roles in plant health. Additionally, the article examines the colonization mechanisms of Flavobacterium species in plant roots, including the involvement of the type IX secretion system (T9SS) and outer membrane vesicles (OMVs). The review emphasizes the need for further research to understand the molecular mechanisms underlying the interactions between Flavobacterium species and plants, and to explore the potential applications of these bacteria in agriculture.The article reviews the role of Flavobacterium species in improving plant health, highlighting their ecological niche, functional roles, and molecular mechanisms. Flavobacterium, a genus within the phylum Bacteroidota, has been recognized for its diverse habitats, including aquatic and terrestrial environments, and its potential benefits to plants. The review discusses how Flavobacterium species contribute to plant growth promotion, disease control, and tolerance to abiotic stress. It also explores the production of volatile organic compounds (VOCs), nutrient sources, and plant hormone-mimicking compounds by Flavobacterium species, which play crucial roles in plant health. Additionally, the article examines the colonization mechanisms of Flavobacterium species in plant roots, including the involvement of the type IX secretion system (T9SS) and outer membrane vesicles (OMVs). The review emphasizes the need for further research to understand the molecular mechanisms underlying the interactions between Flavobacterium species and plants, and to explore the potential applications of these bacteria in agriculture.