Lovely roses, clematis and poppies! The peony looks a lot like "Bowl of Beauty". Those other flowers are nice too. -10 deg C is 14 deg F. I'm certain that it can live in a container if your temps go that low during winter. I saw those growing in the Spanish hillsides, so I guess some of them can take a lot of heat.
All those flowers are drop dead gorgeous! My goodness. I guess up here i can only dream,,,lol. Thank you for the flower show,,, well worth the stop!