Dahlia Trial Garden
About the Dahlia Trial Garden
One of the largest official trial gardens in the U.S. and Canada, the Dahlia Trial Garden is maintained in cooperation with the Washington Dahlia Society.
The garden is comprised of plants grown from tubers sent by dahlia growers from throughout America, Canada, England, New Zealand and Australia.
Each year, the dahlias are scored by official judges of the American Dahlia Society. Dahlias receiving between 85 and 100 points are included in the annual classification book. They are then named and become available to the general public. Blooms begin in July, but August is the best time to view the garden in full bloom, when plants reach heights higher than 6 feet.
Volunteer in the Dahlia Trial Garden
Garden Club Volunteers are vital to help maintain the botanical gardens in Point Defiance Park. Regardless of your expertise, if plants are your passion, we’d love to have you join us in nurturing ours.