Join Markham Regional Arboretum Society today! See below for information on membership dues and benefits. Then download and print the Markham membership form in PDF format. Membership Order Form If your browser is unable to read the above files, you may need to download the free Adobe Acrobat Reader. Membership Dues Individual membership $30 Regular, $25 Retired Dual membership $35 Regular, $30 Retired (Retired = 65 or over, Dual = two adults with one mailing address) Horticultural Organization / Club $25 (volunteer membership) Business / Commercial $100 Contributing Member $250 (includes honoring plant in Arboretum) Life Member $1500 (includes honoring tree in Arboretum) Make checks for membership payable to: Markham Regional Arboretum Society. Membership includes a free subscription to Diablo Horticulturist and a free 1 gallon plant. Dues and donations are tax deductible to the full extent of the law. For more information, please call us at (925) 681-2968 or send us e-mail at info@MarkhamArboretum.org.