This garden was built on the 14 floor of a balcony facing south/west.  The hot, dry sun baked the previous garden and a weekend away meant dead plants.  This custom self-watering garden solved the problem. The owner could leave for a week and the garden was fine. It is past frost and spring planting is complete. See photos below.

The plants are growing well.

4 weeks later.

Mid summer...

Look what it produced!