If the number one plant in Amsterdam is box, the second is most definitely the rose. Roses are everywhere, scrambling over doorways, steps and walls.
Here in the UK you don’t see many roses in pots, especially climbing ones. Somehow the message we seem to have absorbed is that they don’t grow well that way. However in Amsterdam roses are often growing in the tiniest pots imaginable (as you can see from the pic above) and are positively blooming.