Plants for commercial properties need to look tidy and be tough. Here are two examples.
We had to treat this design as a rooftop garden because the depth of the beds was only ten inches. Trees planted in these beds had damaged the concrete, so we could only use perennials in the re-design. The use of vines visually compensated for the absence of the height of the trees. These beds are irrigated with a drip line once a week.
These containers have plants in them that only need weekly watering, even though they are very exposed and surrounded by concrete.