If you love peonies, you should not miss visiting the Adelman Peony Gardens located in Salem, Oregon, just an hour south of Portland. The peonies are in bloom generally from May – June. During this bloom time the Adelman Peony Gardens has an open house daily 9 AM – 6 PM to allow you to visit their display gardens, their peony production fields, and they have an indoor display showroom. Their open house is also free!