Used tires in gardening?

Used tires in gardening?

Years ago, someone dumped a truckload of used tires on our land. (Rednecks are awesome!) I have an idea of using those tires as a border for a small raised garden in a corner of my yard. I plan to stack them two high, and make the tires themselves a sort of planter for tomatoes, rosemary, etc. My question is: Is this insane? Am I setting myself up for leaching chemical problems? Thanks for your input!
Just got my room redone…

Just got my room redone…

Azaleas

Azaleas

from the sunny land of singapore…

from the sunny land of singapore…

Controlling Chinese Wisteria Vines

Controlling Chinese Wisteria Vines

MOLD UPDATE!

MOLD UPDATE!

Marigolds!

Marigolds!