I have to admit, I find these recycled tire planters charming. Planting containers made from tires are pretty easy to make and cost almost nothing. Since it costs to dispose of tires, getting a few used wheels from a local auto shop should be a snap.
Old tires don't have to go to the landfill when they're no longer useful for transportation. You can color them in different colors and make a planter, make a swing for children, or you can make tire ottoman covered with fabric.