I've heard that tires degrade and release toxic levels of zinc. Try something else for the long term.

Thanks, I just read that. I will probably get my tractor and mix up a lot of compost to loosen the soil up in the area and then plant them in the ground with a wire guard to protect them from voles. Though the deer seem to be a bigger problem. They will come right up on the front porch to eat plants they like.

They are prime habitat for growing mosquitoes. Be sure you have a way for the rings to drain.

Carla in Sac

Decades ago we would plant potatoes in old tires. Zinc is sold a a nutritional supplement - I'm not sure that is a recommendation. But if I were burdened with old tires I would use them.

For pecans?