A client in New Jersey had seen a picture in a book of a double allee of standard European hornbeams.
She had planted a similar allee but had not been able to do the form pruning to make all of the trees identical in size and form. She called us.
We set up an elaborate system of lines to mark the overall shape and dimensions of the allees, along with a mobile square line set to mark the form for each tree. It took more than half a day just to get the lines in place.
Two days later, we had completed the formal allee. With a few adjustments, it was now ready for her gardener to prune, following the lines we laid out.