Based in Hamilton County, Indiana. The purpose of the Hamilton County Master Gardener Association shall be to promote the art, science, and pleasure of gardening in the community, in cooperation with the Cooperative Extension Service of Hamilton County and Purdue University. We are a 501(c)3 non-profit organization.

National Garden Bureau is a non-profit organization that exists to educate, inspire, and motivate people to increase the use of garden seed, plants and products in homes, gardens, and workplaces by being the marketing arm of the gardening industry. Our members are experts in the field of horticulture and our information comes directly from these sources.

We are an independent non-profit organization committed to bringing you award winning flowers and vegetables. All-America Selections is the oldest, independent testing organization of flower and edible varieties in North America.

He north american mycological association (nama) is a 501(c)(3) non-profit organization of professional and amateur mycologists with over 80 affiliated mycological societies in the united states, canada and mexico.