Bring the yarn to the front between your needles so you may do a yarn over between a knit and a purl stitch. After passing it over the right needle and moving it toward the rear, bring it back between your needles and move it toward the front so that you are prepared to purl the next stitch.
How do you Purl Yarn Overs?
Bringing the working yarn forward between the needles as you would for one yarn over is the first step in working two yarn overs in a row. After that, you wrap the yarn over the top of the right needle and bring it back forward between the needles, effectively wrapping the yarn once around the right needle.
How do you yarn over at the beginning of a purl row?
Simply move the yarn in front of the needle before you knit if you are performing a knit stitch, or move your needle in front of the yarn before you purl if you are doing a purl stitch. This will allow you to start a row with a yarn over.
What is moss stitch?
Creating moss stitch designs is as simple as alternating knit stitches and purl threads across an even number of cast-on stitches. The design for the British Moss Stitch, also known as the Seed Stitch, repeats itself over two rows, but the pattern for the American and Irish Moss Stitch repeats itself over four rows.