Due to the fact that I will be moving places later this summer, I decided back in March that I would plant some bee flower seed mix on my tiny balcony instead of the usual vegetables. I got the for free from a good friend who works for a nature conservation society.
The results have been great! I constantly see bumblebees, hoverflies, honeybees and all kinds of wild bee species around my flowers. It feels great to provide a tiny feeding spot in a place that is surround by agricultural monocultures and I can only recommend it to everyone who has even the tiniest bit of space left in their garden or on their balcony.