What state you in that you don't have hard clay rocky soil like us in AR? I wish I have soil like that so I can plant thousands of trees. For now, I have to plant few at a time because so much work to dig out clay rocky dirt then bring in better soil for planting. Great job. Thanks.
We're in Michigan. One way you can keep from bringing in soil is to get wood chips/carbon down on the ground. If you can find a tree service to drop chips, you can cover your area and wait.