Now that I have a few rows put together, I start to join them. I iron the raw sewing edges in the same direction per row. Then for the next row that I sew on to it. I sew the raw edges the other direction so that I don't have to sew over six layers of fabric if they both decided to fold over in the same direction. This also helps to keep the quilt smooth. When sewing rows together, I manually align the square seams so they line up between the two rows.