You may remember my Grow Box project/experiment and the stick of a tomato plant I planted in it:
Here is the plant a month and a half later:
And the tomatoes on this thing seem pretty big to me - here's a picture of me holding my lens cap by the tomatoes to show how big they are.
Seriously, this experiment has been going so well with the tomato plant, I may just do tomatoes like this from now on. Yep - I highly recommend the grow box.