We started our journey on a typical Oklahoma Bermuda grass lawn. Our first purchase was the Square Foot Gardening book and built two 4ft x 4ft beds using the methods outlined in the book. We still subscribe to many of the ideas learned from this book but have adapted and combined ideas from many different sources. For example, the book recommends using black weed cloth below the beds to prevent weeds from growing up through the soil. We found that the Bermuda grass just grew right through the cloth and we spent too much time pulling grass out of the raised bed. We now lay thick sheets cardboard below each raised bed. We get the benefit of blocking out the sun so that the Bermuda grass doesn’t grow and the cardboard will feed and encourage worm activity as it breaks down.