The International Rose Test Garden is a rose garden in Washington Park in Portland, Oregon. There are over 7,000 rose plants of approximately 550
varieties. The roses bloom from April through October.

In 1917 a group of Portland nurserymen came up with the idea for a rose
test garden. Portland had a group of volunteers and 20 miles of rose
bordered streets left from the 1905 Lewis & Clark Exposition, and was
already dubbed "The City of Roses".  Between Portland Parks & Recreation
and the American Rose Society, the garden idea soon became a reality.