These pink calla lilies were a surprise as I had forgotten that I had planted these in the bottom of the flower-pot of football mums about two years ago. I had given up on the calla lilies since they did not do anything last year and the mums were not doing much better, so I just left the flower-pot alone except for watering. I like mixed bulbs in my flower pots but when they take a few years to actually bloom I forget about them and then they provide that surprise.
I know I need to work on my patience! What kind of surprises have you found in your gardens or flower-pots that you have planted and forgotten?