I am about the furthest thing from being an expert on outdoor growing. I know nothing about this type of growing.
With that said, and I hope you respect candid comments......I've been following this grow from the start with pictures in my head of 13' plants covering the hillside.....heck, you've shown pics of your Maine grows with that size plants.....unless these plants start growing while being well into what appears to be flowering, they don't look like the trees I was expecting.
Was it your late start or something else that prevented these very healthy plants from reaching their height potential?