L&C County MSU Extension - This office serves as an outreach function of Montana State University dedicated to improving the quality of people's lives by providing research-based knowledge to strengthen the social, economic and environmental well-being of families, communities and agricultural enterprises.
Arbor Day Foundation - Founded in 1972, the centennial of the first Arbor Day observance in the 19th century, the Foundation has grown to become the largest nonprofit membership organization dedicated to planting trees, with over one million members, supporters, and valued partners.
Trees are Good - provides the public with educational information about the benefits of trees and how to properly care for trees in the urban environment. The site contains resources from the International Society of Arboriculture, and also provides a collection of reliable tree care information provided by other industry organizations.
International Society of Arboriculture - Through research, technology, and education, the International Society of Arboriculture (ISA) promotes the professional practice of arboriculture and fosters a greater worldwide awareness of the benefits of trees.
Growing Friends of Helena - is an urban tree-planting organization. Its purpose is to enrich the quality of life in the Helena, Montana area with extensive planting of suitable, attractive, diverse, and well-cared-for trees and shrubs