Northern & Central Midwest
The tagline, "The Business of Fruits, Nuts and Vegetables" says it all. Growing Magazine is an informative online and print magazine that will help anyone who is in the business of selling produce. It also has plenty of information for the home gardener, and lets you know what your fellow gardeners are doing.
How to deal with soil may seem a basic bit of knowledge that everyone has naturally, but Healthy Soils for Sustainable Gardens, by Niall Dunne (Brooklyn Botanic Garden, 2009) will let you know that's not the truth. This jewel of a book has an entire semester's worth of soil information in a readable, enjoyable format. It gives the science of the soil web, in comfortable, understandable terms, and you come away with the logic of it firmly planted in your brain.