It took a few more weeks until I was able to fill the bed with dirt. I put a layer of peat moss in the bottom of the bed and then added dirt from our dirt pile (dirt removed from other beds and stored in a pile next to our compost pile).
The row cover is held down with bricks that are laying by the woods from an old patio we removed years ago. As I was gathering bricks, I spotted some small blueberries and looked closer. sure enough we have a little wild blueberry bush in our backyard! What a happy surprise!