I recently came across this interesting article about how to grow tomatoes upside down. Whilst I am lucky to have plenty of space for my vegetable patch this looks like a really good way of saving space especially for those with small gardens. You can read the full article with instructions on how to do it here but the end results look something like this picture. It also has the advantage of creating a colourful canopy. I might give this a go next year, more for the decorative effect than anything else.