The winning gardens in the Society of Garden Designers' annual competition have been unveiled.The Pocket Garden winner was Rosemary Coldstream for The River Garden, "a thoughtfully designed space offering an individual solution to an unusual location.
My suggestion would be to add cardboard or something up the sides to hold water. My garden did SO WELL, but it dried out easily. Also, in the individual holes, I planted herbs, green peppers and zucchini. They did excellent also!