I would think grafting would offer no real advantage over plain cloning. Grafts are rather tricky to get right, and they have to be coddled too much to make it worthwhile for a plant which is destroyed at harvest. There's a reason people only graft trees, bushes, and cacti.
JD1stTimer Reviewed by JD1stTimer on . Root grafting When plants grow, I assume a lot of their energy goes to making roots. What would happen if after harvesting a plant, and leaving the roots in the soil, you grafted a clone on top of the already formed roots? Would it work? Would there be accelerated growth? Or would it be forever crippled? Rating: 5