I grew Alderman peas for the first time this year, and all the info said "anything up to 15' 0", which I took with a pinch of salt, but they have only just reached the top of my 8' canes (with at least 18" in the ground), and don't seem to want to grow any more. I just assumed that that was it, but now that others have brought this up, perhaps that's why they are only 7' 0"ish. I would like them to stay at this height, but I suspect that I may have lost a lot of flowers/peas this year.