Thanks, dstr. It is my first year for the salad bar and I just started it over for another round. It is self watering but I find it is very hot on the deck and I usually do add water every second day. Even though my garden is not far from the deck I find if I can just go out the sliding glass door and walk a few steps to the salad bar I'm not apt to put more greens on the dinner plate. I bought it at Lee Valley but the unit is made in the USA, not screws, mails or any fasteners necessary to put it together. Here is the link http://www.leevalley.com/en/garden/page.aspx?p=74022&cat=2,44663,71822