The Best International Rose Test Garden Reviews References. I was just there this weekend and was so surprised that it's still gorgeous this late in the year! Web 5,666 reviews #5 of 462 things to do in portland gardens write a review about the oldest official, continuously operated public rose test garden in the united states boasts more than 8,000 roses.

International rose test garden review. The national annual winners from both ars and aars associations are displayed in. International rose test garden comes in at #1 in portland with endorsements from 10 publications like where, lonely planet and atlas.