The Upside-Down Tomato Project
I've seen this experiment tried a couple of times, I'm not sure if the results were too good, but I thought I'd try making an upside-down tomato plant this year. Take a large plastic bottle and a small tomato plant. Cut a hole in the top side of the bottle so that you can fill it with compost and make holes in the top to hang it. Wash all the soil off the roots carefully.