I am interested in adding height and drama to peonies, so looking for plants to be higher than peony foliage. We will see how it will work this summer. Interplanted with delphiniums, phloxes, penstemons, some low Buddlejas, foxtail lilies, alliums, amsonia, coneflowers, liatris and gauras. Medium size - decided to go with a lot of geraniums, lupins, catmints, salvia, sedum, heleniums, guillardias, russian sage. Also, thinking to add grasses at the back against yew hedge - in future.