Upgrading my tiny garden

After removing some tiles and the hortensia, my garden looked like a desert...
Watch that corner in the triangle, that's the place to start a small 'cold' compost-heap.









Now, a few months later, my garden is running wild!
Even the potatoes are flowering.
Now I have to figure out how to keep the potatoes in check; having potatoes in my garden for a long time will deplete the ground unless I find some other plants that will remedy this...