Bambus
Hibanobambusa tranquilans "Shiroshima" is supposed to reach a height of 1.5 to 2 meters at most, but though this would make it an ideal indoor plant, it feels more comfortable outside. It can even stand cold temparatures, down to -20 degrees Celsius!
In the shop they told me to put it into a new pod, and they sold me the pod and some special bambus soil right away. So this is what it looks like in the new pod - twice as big and a lot heavier! I'll put it on my balcony because I don't have a garden. That way, it can have as much fresh air as it likes, and I can watch it growing.
By the way, I bought the plant at a tree nursery in Baden-Baden Oos, which unfortunately closed in 2015. They had a remarkable selection of different bambus plants (and other plants) and they offered good advice, too. And their web site was really great (in German). They couldn't find a successor.
Unfortunately a very cold winter was a little bit too cold for the potted plant, and thus it does no longer live with me...