container garden on concrete

bosewichte(7a/8b)March 14, 2012

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?

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calistoga_al ca 15 usda 9

What you are thinking of should work fine. Al

    Bookmark   March 15, 2012 at 9:04AM
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Great, thank you!

    Bookmark   March 15, 2012 at 9:42PM
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We did basically the same thing in our yard (wooden boxes with plywood bottoms, on rollers so they can move around the concrete easily). I found that 1 foot worked fine for beans and peas, lettuce, chard, kale, radishes, short baby carrots. Zucchini didn't work *great* in this depth, but a container variety of zucchini might work (I saw some at Territorial Seed and Swallowtail nursery this year). Smaller pepper varieties will probably work fine. The taller peppers might need a tomato cage for stability. Anything with longer more demanding roots, tomatoes in particular, needed at least 20" of soil So we just built up a couple of our boxes to be deeper for tomatoes. We keep one of our beds shallow and use it for beans and lettuce.

Good luck.


    Bookmark   March 18, 2012 at 12:34PM
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