I've never grown oriental poppies and I saw a picture of "Patty's Plum", which is a dark burgundy color and so I bought a few of them - around 3. Now, I'm wondering what would be some good companions for it. So far, I was thinking of pink peonies, white Siberian irises and purple catmint. Any other suggestions? Also, should I place the poppies in the back? How big do they get? Any ideas would be appreciate! Thanks!