Awasome International Rose Test Garden Admission Fee Ideas. Web hi there, i am rachel burlington, the curator of the international rose test garden, part of portland parks & recreation. Take time to smell some of the 10,000 roses representing 650 species when you stroll through the active test garden, located in portland’s popular washington park.

Web the primary purpose of the garden is to serve as a testing ground for new rose varieties. Hood in the background, and it doesn’t get any better for a kodak moment. The rose garden is in washington park, and it is free to visit.