Thanks to the kindness of a good friend, we received a truckload (about 27 cubic feet, or 1 cubic yard) of “black gold” compost mix this morning purchased from St. Louis Composting in Milstadt, IL (http://www.stlcompost.com/products-compost.htm). Total cost was $22. Reportedly this mixture will grow just about anything. A couple of hours later we had this in our raised beds and are now ready to begin planting.
Our beds are 3′ x 8′ and 6″ high, so it took around 24 cubic feet of soil to fill these with some to spare. We also decided to add the excess soil to another small unraised section of the garden, and covered it with a weed mat.