Established in 1992, Mariani Plants is a wholesale grower of trees, shrubs, and perennials, with nurseries in Garden Prairie, Illinois, and Kenosha, Wisconsin.

Cardno, now Stantec, Native Plant Nursery, is a native plant and seed nursery in northwest Indiana. They have been growing Midwestern native upland and wetland plants for habitat restoration, landscaping, and green infrastructure projects for over 25 years.

American Native Plants was established in 1998 as a small, 2-acre backyard operation in Kingsville, MD, growing only five different species of native trees and shrubs.