Maryland Christmas Tree Association
- Represents Christmas trees growers in Maryland.
- http://www.carr.org/~waynet/mcta/mcta.htm

Pennsylvania Christmas Tree Growers Association
- Includes consumer information, trade pages, details of membership benefits, tree and nursery locators.
- http://www.christmastrees.org/

North Carolina Christmas Tree Association Carolina Christmas Tree
- North Carolina Real Christmas Tree Farms
- http://www.ncchristmastrees.com/

New York Christmas Tree Growers Association Growers' Association
- Real Christmas Trees in New York
- http://www.christmastreesny.org/

Michigan Christmas Tree Association
- Locations of real trees in Michigan
- http://www.mcta.org/

Massachusetts Christmas Tree Association
- Massachusetts Christmas tree growers
- http://www.christmas-trees.org/

Manitoba Christmas Tree Growers' Association
- Canadian association for the owners of Christmas tree farms. Information on planting, growing, shearing and care of trees for choose-and-cut or pre-cut sales, and a member directory.
- http://realchristmastrees.mb.ca

Maine Christmas Tree Association
- A non-profit organization of family farms that produce real Christmas trees and wreath products.
- http://www.mainechristmastree.com/

Iowa Christmas Tree Growers Association
- Directory of members, plus information on Christmas tree selection and tree recycling.
- http://www.iowachristmastrees.com/

Indiana Christmas Tree Growers
- A listing of Christmas tree growers in Indiana
- http://www.indianachristmastree.com/

Illinois Christmas Tree Association
- The ICTA site provides a searchable listing of Christmas tree farms in Illinois by county. Offers information on the importance of real Christmas trees and how to care for them.
- http://www.ilchristmastrees.com/

Georgia Christmas Tree Association
- Christmas tree farmers in state of Georgia.
- http://gachristmastree.com/