Any vessel is suitable for container gardening if it has drainage - even an old boot will do if there is a hole in the sole.
Drainage is to container gardening as location is to real estate.
The quality makes container gardening a good starting point for gardeners with disabilities. The major considerations given to container gardening are the size of the container, adequate drainage, and the requirements of the plants. Small containers such as ceramic pots and large institutional food cans can be placed on benches for accessibility. There are a number of commercially produced plant containers available, but wooden boxes, barrels, and even old bathtubs work equally well. If you container plant start to wilt, don't worry.