Companion planting (aka interplanting) is an ancient farming method of using plants to enhance and support each other. For example, about 2,000 years ago the Roman agriculturalist, Varro, declared “Large walnut trees close by, make the border of the farm sterile.”

This is an excerpt from the HGEL ebook “Starting and Maintaining a School Garden Program: A Guide to Recognizing Your Saints” which will be available for purchase from the HGEL Groedibles.com store opening Spring of 2011.