It has taken me a while to get my head around the concept of support species and how they work. All the diagrams in every Permie text I've read show cross-sections of a hypothetical Food Forest and I've always thought - "how do the larger support species not compete heavily for nutrients in the early phases when they are outgrowing the productive species (heightwise)?
I stumbled upon this video recently and suddenly it all clicked! I have now gone mad planting Tagasaste babies everywhere around my young fruit trees and filling out my forest.
Huzzah for Geoff Lawton!