If your garden space is limited or you don't have workable ground to plant in, try your hand at planting vegetables in tires. Much like container gardening, growing in tires keeps soil contained, warm, and decreases time spent weeding. You can plant any vegetables in tires that you would plant in containers including tomatoes, carrots, lettuce, onions, peppers, spinach and even potatoes. Typically you'll want to use one to three tires stacked on top of each other to allow enough growing room for your plants' roots.
Cut out the sidewall of the tires with a sharp utility knife to expand the growing space.
Set the first tire down on bare ground, or, if you're working on a balcony or roof top garden, spread an unfolded garbage bag out on the floor and place the first tire over it.
Fill your bottom tire with potting soil. If you are planting lettuce, spinach or onions, proceed to Step 4. If you will be planting carrots, peppers, zucchini or squash, place a second tire over the first and fill with soil. Repeat with a third tire if you plan to grow tomatoes, cucumbers, gourds or melons.
Plant your vegetable seeds or seedlings into the soil in the center of the tire. Lightly cover seeds and firm the soil around seedlings. If your vegetables will require support stakes or tomato cages, add them now.
Water your seeds and seedlings to dampen the soil all around without soaking the soil. Check the moisture of the soil every few days with your finger. Water to dampen anytime the soil is dry 1 inch under the surface.