Answer: To use brick for the sides of a raised garden bed you will need to put down a fairly deep foundation just as you would for a brick garden wall or retaining wall or similar project. This is needed so it does not frost heave during the winter months. You might be able to frame the bed in concrete block and then use brick as a veneer without doing so much extensive foundation work, especially if the bed is not too tall. Or, if you only want the bed to be a few inches high, you can dig down about six inches, layer in gravel and then crushed stone or sand and then set your bricks at a slant on that. Your local county extension may have more detailed construction suggestions based on what you are trying to do. Also, you may want to take a look at the following web site on constructing raised beds. You may have to cut and paste the complete url into your browser to make it work correctly.
Have fun with your project!
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