We wouldn’t recommend trying this, as the weight of the full buckets could be significant and may pose a safety hazard, depending on your balcony. If you have an area of the balcony that gets a lot of run-off from the roof, you could place one or two large containers (with drainage holes in the bottoms) and make a sort of mini rain garden. We wouldn’t recommend going beyond that!
We wouldn’t recommend trying this, as the weight of the full buckets could be significant and may pose a safety hazard, depending on your balcony. If you have an area of the balcony that gets a lot of run-off from the roof, you could place one or two large containers (with drainage holes in the bottoms) and make a sort of mini rain garden. We wouldn’t recommend going beyond that!