Container question - galvanized metal tub
I have an old galvanized metal tub that I'd like to use for planting some herbs. My husband drilled holes in the bottom for drainage. But then I got to thinking .... this is going to go out in the garden in full sun all day long. Will the galvanized metal heat up too much and fry the roots of the plants? I've seen plants in galvanized tubs before, but maybe it isn't such a good idea for full day-long sun?