Armed with a bag full of flowers, soil and a small plastic watering can, Anton Schuurmans walks around town planting daffodils or geraniums in every pothole he finds, sometimes braving heavy traffic to reach the middle of busy crossings.
People stopped and took pictures on their phones as they walked by the flowers, many agreeing that the potholes had become a problem.
"There are many potholes in the street in front of my house, so we hear a lot of noise every evening as people drive over them quickly," said Mathieu Taziaux, who works in Brussels.
"At least one pothole has been repaired two days after I planted the flower in it," he said. "I was quite happy to see that."