The ten basic tenets of square-foot gardening are: 1. Arrange your garden in squares, not rows. Lay it out in 4′x4′ planting areas. 2. Build boxes to hold a new soil mix above ground. 3. Space boxes 3′ apart to form walking aisles. 4. Fill boxes with Mel’s special soil mix: 1/3 blended compost, 1/3 …