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!
yet another mystery plant

yet another mystery plant

Belgin Mums

Belgin Mums

Just some photos and an observation

Just some photos and an observation

My favorite room in the house….

My favorite room in the house….

hi! long while.. another ID

hi! long while.. another ID

Living at college but home is where the heart is

Living at college but home is where the heart is