All the while I am thinking this will be a constant battle with gravity. Why not just plant the tree upside down and let it grow upright. After a few years of growing and the tree is ready to train in a bonsai pot I could just flip it over and have a cascade style Black Pine. Will it work? Lets find out.
The first step was to punch a hole in a 15 inch square grow tray.
The next step was to wire the tree and plant it upside down in the tray.
I stuffed some sphagnum moss in the hole around the trunk and wired the roots down into the tray. I bent the trunk upright and wrapped some plastic tape around the pot to add some stability.
Here are the 2 trees side by side. One up, one down. Now we just wait and see how they grow.