The farm recently purchased Square Foot Gardening by Mel Bartholomen. And while Mel does overly state his accomplishments (the originator of gardens in a box?) and he writes in the third person, this book does have worthwhile information about building boxes for plants. We like the aesthetics of the boxes but they are also practical for controlling soil quality and temperature. We bought 400lbs. of soil and manure to fill the boxes and also mixed compost from Kimberly in there as well.