The Mailorder Gardening Association 5836 Rockburn Woods Way, Elkridge, MD21075 The Mailorder Gardening Association is a member organization of mailorder gardening and gardening magazines. It provides…More information on gardening products and gardening services through catalogs and magazines of its members. The association meets twice a year to discuss and begin ways to make mailorder shopping for garden products the best choice for consumers. It also sponsors a garden grant program for school age children. For more information, visit the Mailorder Gardening Association website.