The Tower Garden shown below is from  Future Growing LLC which O'Hare Airport is using in its rooftop garden. One photo below shows a restaurant in NYC that uses a Tower Garden for really fresh produce! The Tower Garden is hydropoonic while the Garden Tower shown on the previous page is soil-based.  John Kohler of Growing Your Greens explains why he thinks that the Garden Tower is better than the Tower Garden in his video Why Buying a Tower Garden May be a BIG Mistake.