Followed your link back to this article. Wondering how well the ground cuttings worked? Did you get a good success rate after doing this in the Spring? What height do you recommend for burying them? To the next node, halfway, or some other strategy?
With my bonsai tree cuttings, I usually get the best success rate when I put cuttings diagonally for some reason. Maybe that helps keep it better moisturized than upright. I always use a tray of sand with no drainage holes, and I get lots of lateral spreading roots, which is ideal.