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!

Stuffed animals

Stuffed animals

a Goodwill find and some inspiration…

a Goodwill find and some inspiration…

GUYS!  GUYS, I have a TOMATO! :DDDDDD

GUYS! GUYS, I have a TOMATO! :DDDDDD

Desert Botanical Gardens

Desert Botanical Gardens

I gave you an inch, you want a house with a yard.

I gave you an inch, you want a house with a yard.

Please help identify a flower bulb.

Please help identify a flower bulb.