There is growing demand for a broader conception of tree and forest health by commercial and private timberland owners, who make up a substantial proportion of Extension clientele in the southeastern United States. There has been little research to comprehensively capture and represent Extension agents' needs, concerns, and perceived barriers as they respond to client questions and requests regarding tree and forest health topics. Our needs assessment results highlight needs and barriers Extension agents encounter as they address tree and forest health requests from clientele. We provide recommendations for research and practical applications for improving relevant resource support in Extension.