Originally formed in 1965, the California Native Plant Society (CNPS) is a statewide non-profit organization of amateurs and professionals with a common interest in California's native plants. The Society seeks to increase understanding of California's native flora and to preserve this rich resource for future generations. Membership is open to everyone.
Members of the Napa Valley chapter of the CNPS hail from Napa, Sonoma and Lake counties. The chapter is responsible for upkeep of the Martha Walker Native Habitat Garden at Skyline Park in Napa, sponsors local lectures and workshops, and holds twice yearly native plant sales.