Something @Jetdro said the other day sparked my imagination, I thought this was a good place to put it.
So it made me think about grafting as a way to get both the increased vigor of a seed and the predictability of a cutting. The idea is to plant a rootstock variety from seeds, perhaps even hemp. You also take rooted cuttings of the scion that are the same size as the seedlings and transplant them to the same container and make a graft of both the rootstock and the graft. Once the graft takes, you cut the top off the rootstock and the root off the scion. This is similar to how they do it with tomatos.