container garden on concrete
A few years ago, my husband built three 4 feet by 4 feet container garden enclosures on a concrete slab in our back yard. They have a depth of about a foot.
Normally I plant shallow-rooted annuals in there, but I'd love to make it a vegetable garden this year. I'm thinking peas, radishes, lettuce, peppers. Is a soil depth of a foot enough to support their root systems?
If not...any veggie recommendations that would work?