I had a blast doing a White Widow photo espalier awhile back.
Set her up against a lattice on the patio and trained her bit by bit all summer long. The pic doesn’t really show it but I achieved an almost perfect symmetry and a half a pound yield as a bonus. Full disclosure: The quality of the smoke was dismal so she mostly ended up in tincture. It was so much fun playing with her I didn’t mind too much.
The “real” espaliers in formal gardens are generally trees that can last decades.
I don’t know how to add just a copy and paste pic but what about the upside down tomato growing technique. Always wondered if that would work for cannabis.
(**he was having bad vertigo so he asked me if I could crop it for him before the weather took her from him… I was SO PROUD for 2 reasons: 1) Look at this thing! 2) He just turned 50 and only recently has been able to reach out to ask friends for help. SO PROUD !)