In case you're just getting to the party, tires are perfectly convenient raised beds.* This year we have three tire gardens - a few tomatoes in one and two full of herbs. I feel absolutely smug whenever I get to use my fresh herbs in the kitchen (or my fresh mint in cocktails). My basil is not pictured because it's lame this year (when I usually have basil in bushes). On the other hand, my cilantro is thriving for the first time ever.
*As a side note, growing your food in tires over time may or may not give you cancer, since the rubber can leech metals or other pollutants. Some folks recommend using a plastic liner so that the tire doesn't actually contact the soil.