[CANUFNET] Elms and breakage

[reginald eddy via CANUFNET]

Hi Alison, 

I have heard from many sources that the Princeton elm is notorious for having very weak unions. I’ve seen photos of the trees literally peeling down the center. I was in southern England on an urban forestry tour which included a walk through a new residence development. The tour guide explained that they had fully replaced all of the Princeton elms with some sort of hazel because the elm’s structure required too much maintenance for it to remain acceptable. As for all of the other types of elm you mentioned, I do not know. 

Hope this helps! 

Reginald Eddy
3rd yr. UBC Urban Forestry undergrad student


> On Jan 9, 2018, at 1:46 PM, Alison Bond via CANUFNET <canufnet at list.web.net> wrote:
> 
> All:
> 
> At a conference in Quebec City I learned that much of the areas around the parliament buildings were being planted with Accolade Elm with good success.  After that conference we started incorporating elms into our street tree planting plans.  Accolade wasn't always available so there were often substitutions (Valley Forge, Princeton, Pioneer, Triumph.)
> 
> I have recently noticed that some of the elms (when reaching about 15.0 cm dbh) are starting to break apart and large branches are failing.  Many of these elms are vigorous growers and municipalities haven't been able to keep up with pruning to keep the form strong.
> 
> Has anyone else noticed this predisposition to breakage? 
> 
> Thanks.
> Alison
> 
> Alison Bond BSc MSc BLA   OALA  CSLA
> Landscape Architect and Certified Arborist
> 
> ENVISION-TATHAM Inc.   
> 115 Sandford Fleming Drive, Suite 200, Collingwood, L9Y 5A6
> abond at envision-tatham.com I  Tel: 705.445.0422  I  Fax: 705.444.2327  I  Cell: 705.994.2059 I   www.envision-tatham.com
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