I decided on the machine applique stitch that it needed some heavier lines. I considered cable stitch but wanted something that really looked organic. So I tried some whip stitch. I loosened up the bobbin so the bobbin thread comes to the top. To do this stitch, you need to move the fabric slowly but put on the gas on the stitch pedal.

 I used the dark purple thread as I thought it needed more dark lines.

Here you can see how far up off the fabric that the whip stitch comes. I’m happier with this now, but I”m still not sure it is finished. What do you think?