Rose ‘Veilchenblau’ (Violet’s blue), several poppy cultivars (wild-coloured P. somniferum, a feathered red and white one [habit similar to P. somniferum] and a more robust pink and purple one [closer to P. orientale]), and Astrantia sp.
All Papaver sp. are grown for educational purposes.
Kihaku-Gato's Garden Blog (tumblr import) 