The Northwest Nursery Improvement Institute is an organization of professional nursery men and women who assist in tree fruit nursery product development. Its members focus efforts in providing quality, true to type, and pathogen-free product for the national tree fruit industry.

NNII combines the talents and resources of its members and external services to benefit nurseries and their clients. NNII sustains inter-nursery communication, carries out government relations, supports and conducts research, protects proprietary property, and assists in product education.