Interstem, interstock The Plumeria > Interstem, interstock Posted on September 13, 2016November 10, 2022 by PlumeriaDB ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ Share This Tweet Share Tags: PropagationCategories: PropagationThe middle piece of a graft combination made up of more than two parts, i.e., the piece between the scion and the rootstock. Often has a dwarfing effect.