I have some old iron containers, no bottoms so the drainage would be good. I'm just concerned about the amount of rust on these containers. I think the rust will leach into the tomato plants and I just want to make sure it is not a heath issue when the tomatoes are consumed.
Certified GKH Gardening Expert
The rusty iron itself will not be an issue. Just make sure that there were no harmful substances stored in the containers before.