My 2013 small veggie garden a few weeks after planting it: tomato, pepper, yellow onions, lettuce & Cilantro plants, plus planted seeds for zucchini, green beans and broccoli. The tires (with the sidewalls sawed out of them) surround the tomato plants, plus the white PVC pipes in each one are about 2 ft long each, with 6 holes drilled along one side on the lower 6" of the pipe, then placed where the holes will be alongside the roots. The tip is to only water the plants via the pipe, giving them about a pint of water every 3-5 days. It's a new technique for me to try this year.