Do galvanized containers get too hot for sunny plant locations?

Asked April 18, 2015, 9:25 PM EDT

Do galvanized containers get too hot for sunny plant locations? Love the look....but should they be lined to keep soil and roots from "cooking" in the summer sun? What would I use for a material if lining is recommended? Thank you, Joan

Penobscot County Maine

1 Response

the short answer to your question is no, the galvanized containers will reflect heat - you would have more of a heat issue with black containers which absorb heat. That said, galvanized containers have a zinc coating (which can contain cadmium) which prevents the underlying steel or iron from rusting. If you have these containers for a while, or if your soil/water is acid, the zinc coating can corrode, and the zinc and cadmium can be released and uptaken to your plants. So this would be a major consideration if you were planning on growing veggies for your family in the galvanized containers. Small amounts of zinc help your immune system but large amounts of zinc and any amount of cadmium can be poisonous.