Here is a root graft I did for a client, Its 3 strains in one. Chemdawg SR-Chemdawg 4-Sherbert. The project was nicknamed “3 RAY”.
I think people were stuck on stem grafts, when other parts of the plant can be grafted. Now this plant counts as one plant instead of 3, It was successful, I got roots to the bottom of the cube and I have since passed it on to the client. Its currently in their grow. I personally have not seen a cannabis stem graft and this is the only rootgraft that I’m aware of.