How to make a Sub-Irrigated Planter. I'm not sure I would use a two liter plastic bottle though. Over time I would fear the plastic breaking down enough to poison the plant. Perhaps a wine bottle instead.
This helpful chart is from Uncle Jim's Worm Farm, but your vegetable-planting schedule will vary depending on where in the country you live. The USDA has a handy Hardiness Zone Map, and you can find a more detailed planting schedule here.