Vegetables in used tires?
Hi, I'm starting to plan a raised-bed vegetable garden for next year. I've seen a few mentions here of people raising vegetables in used-tire beds. That has a sort of tacky appeal to it, easy to change around in future, and the price is right. But I have no idea what sort of chemicals old rubber (etc.) may keep giving off. I know we're not supposed to grow produce in pressure-treated lumber. How about tires? Any thoughts?