Kieth --- The way you said it, is precisely what I mean ----- "The high point for me is where the highest two petiole canals intersect." It's more descriptive than petiole emergence, a phrase I coined. I will no longer use it and use yours only.
Tony --- you said "Is that the newest or oldest leaf ?" What part of "last sprouted" don't you unnerstand? Posting
and beer drinking
don't mix!
B'mal