Rootstock Posted on November 8, 2022August 1, 2023 by Tex Norwood The portion of a plant used to provide the root system and sometimes the lower part of the stem for a grafted plant. Related Articles: Grafting and Budding OverviewPlumeria – Cutting, Rooted or GraftedGlossary: BuddingGlossary: Interstem, interstockGlossary: Scion