Carter, The mix I used one this one was 2 parts potting, 1 part grit. When I planted the seed I covered them with 1/8 inch vermiculite. I am now using what I call my 3G mix, (3 grits), 1:1:1 pumice/#2 cherrystone/zeolite. I am happy with this mix (shown in the photos below) because it adds weight to the pot and allows plenty of water and air flow to the roots, and being almost impossible to overwater.
Joe
