In 2017, ReLeaf Michigan became a founding member of the Michigan Oak Wilt Coalition, a partnership between private, nonprofit and government organizations. Led by the Arboriculture Society of Michigan (ASM), the partnership also includes representatives from Michigan State University, the Michigan Department of Natural Resources, the Michigan Department of Agriculture and Rural Development, the Michigan Forest Association, electric utilities and private companies.

Oak wilt is a fungal disease that is fatal to oak trees and has gained significant momentum throughout Michigan in recent years. The Oak Wilt Coalition's goal is to increase awareness how to prevent the spread of oak wilt and protect our state's valuable oak tree population.