<html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Debra<div class="">I forwarded your post to some of my Landscape Architect colleagues in Toronto. Also attached is a book I highly recommend for managing ancient trees. I attended a seminar in the UK run by the one of authors of this book. Keeping suckers and lower branches is a very critical early step in managing trees of this age. I am managing a large red oak down here in Maryland, US and the tree does sucker on old wood quite well.</div><div class="">Good luck</div><div class="">Jim Urban, ISA FASLA</div><div class=""><a href="mailto:jimtree123@gmail.com" class="">jimtree123@gmail.com</a><br class=""><div></div></div></body></html>