This paper describes a nature-based social-emotional approach to supporting young children’s holistic development that can be applied in a range of early childhood settings from forest kindergartens and nature-based preschools to more traditional center-based early childhood programs. The Social-Emotional and Environmental Education Development (SEED) Framework blends early childhood education, environmental education, and social-emotional development through the integration of best practice recommendations from (a) National Association for the Education of Young Children Early Childhood Program Standards, (b) Early Childhood Environmental Education Programs: Guidelines for Excellence, and (c) Pyramid Model for Supporting Social-Emotional Competence in Infants and Young Children. The SEED Framework provides early childhood programs a guide for integrating and infusing a nature-based social-emotional approach throughout all aspects of their program. (author abstract)