List Of Rose Garden Portland Winter Ideas. Honey nectartm (grandiflora) before the roses in 1918 history Web the international rose test garden in washington park is flooded with roses, and my local favorite is the peninsula park rose garden in north portland.

Web portland’s mild winters, rainy springs and warm summers make the city a prolific place to grow roses — but that’s not the only reason the colorful flower has become a local icon. Located just outside the coastal town of portland, victoria, the treloar roses display garden extends over two acres and showcases over 200 different rose varieties. Web commissioner nick fish | director adena long the international rose test garden in washington park roses are in bloom from late may through october, and best viewed from dawn to dusk.