How to build a straw bale garden, this site has more information... I did it this year and I'm amazed at the size of my tomatoes! I put them around my Rhubarb patches and I was harvesting rhubarb into late September! Give this a try
Why would you choose to do a straw bale garden? You don't have to have a large yard to have this kind of garden. Just large enough to put a few bales of straw. You don't need much soil. It really saves money in the long run.