I went to a gardening seminar a couple of weeks ago and there was a man who owned a greenhouse giving instructions for organic "wick" gardening in large containers. The containers he used were similar to the the cattle tubs that molasses cattle food comes in. He brought several of his containers and the plants were amazing! He started with one 5" hole 5"inches from the bottom, 6"French drain pipe cut to fit the bottom, heavy landscape cloth in a 4 foot square. He also had a 1 or 2"pvc pipe cut at an angle on one end. He put 2 pieces of the drain pipe in the bottom, the covered it with the material and pushed it down around snuggly. Then the other pipe vertically on one side. He then filled it with potting soil. He has his own fertilizers. He then plants whatever. This method made watering easier and only once or twice a week even in the hot summer. I'm excited to try it next year.