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The Washington State Nursery & Landscape Association is a not-for-profit statewide trade organization. Because we are the only organization in Washington State which represents all facets of the “green industry,” our membership includes grower and retail nurseries, landscape services (from design through maintenance), educators, students, garden writers, and individual professionals within the industry.

The Perennial Plant Association is an organization dedicated to the promotion, culture and marketing of perennials. It has numerous member nurseries. This organization is responsible for bestowing the "Perennial Plant of the Year" Award.

It's published quarterly, Perennial Plants contains useful articles about research, propagation, new plant introductions, business issues, announcements and membership information.

The Oregon Association of Nurseries (OAN) is a non-profit trade association that represents more than 1,600 individual nursery stock producers, retailers, landscapers and related companies serving the nursery and greenhouse industry. The OAN is the main voice for Oregon's nursery and greenhouse producers, re-sellers, transporters, retailers and suppliers.

The Idaho Nursery and Landscape Association is an organization of professionals including retail nurseries and garden centers, wholesale, growers, landscape contractors and maintenance firms, arborist and allied trades. It is a resource for increasing professionalism in the Green Industry.

The Montana Nursery and Landscape Association was formed in 1954 by a group of professionals who shared similar concerns and interests in the emerging industry of horticulture. In the years that followed, as the industry in Montana grew, so has M.N.L.A. We represent nursery stock growers, retailers, landscape contractors, garden center owners, irrigation contractors, landscape architects, allied industries and associated individuals within and outside the state of Montana.

The mission of the MNLA is to provide programming, information, and other opportunities for professional development of direct benefit to its members. MNLA monitors and lobbies governmental agencies on issues relevant to the membership. MNLA promotes the nursery and landscape industry in Montana through education and community interaction.