Washington Park - International Rose Test Garden | Portland.gov
More than 10,000 individual rose bushes bloom in the International Rose Test Garden (IRTG) from late May through October, representing over 610 different rose varieties. The majority of roses in the Garden are commercially available. About 10 to 20 varieties are replaced each year with some of the best new roses released onto the market. Roses bloom from late May to October depending on the weather. | Portland.gov
