Rootstock diameter does not directly communicate to the grafted variety that it has been grafted, so the grafted variety doesn't always 'know' it's on a rootstock, which can lead to some size mismatches between rootstock and scion as trees age.
causalpending
Speaker
Sam Van AikenEvidence Quote
“any tree that you graft on top of a root structure doesn't necessarily know it's been grafted onto a root structure, that isn't communicated from the roots to the tree itself”
Source
Creating Multi-Grafted Fruit Trees with Sam Van Aken | The Tree of 40 Fruit (Eps 65)— Orchard PeopleCreated: 8/13/2026, 10:27:11 AM
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