I have a metal trough-shaped, verdigris-colored container that I bought at Marshall's a few years ago. Printed on the bottom is: For decorative use only. Not for food. Can I safely plant herbs in this?
Planting Herbs in Metal Container
Certified GKH Gardening Expert
When growing herbs indoors in a container, the most important thing to remember is to provide a growing environment of nutrient rich soil that has good drainage yet holds moisture. I would recommend placing a plastic liner inside before adding plants or even choose a small plastic pot that will fit inside the metal container. This article should help as well: https://www.gardeningknowhow.com/special/containers/choosing-containers-for-potted-environments.htm