You can use containers in many ways. Sunken containers work well in small spaces. 5 gallon containers can support many vegetables. Even a bale of straw will work. This video gives you some ideas of how to use different types of containers in small garden spaces. Join My Google+ Gardening Community called Our Tomato & Vegetable Gardens - we are approaching 2500 world-wide gardeners: plus.google.com/communities/114956817444053979636 or Link from My YouTube Page.