[CANUFNET] Planting depth

Mon Mar 28 16:13:31 EDT 2011

A picture is worth a thousand words. Here is an American elm that was planted too deep, leading to its failure during a wind storm in Edmonton in July 2009 . This tree showed no obvious signs of stress before it failed, increasing its hazard potential. The leaves are wilted because the tree was lying in the sun for a few days before the forestry unit was notified.

I hope these photos are useful to everyone.

Trevor Thistle B.Sc. (Forestry)
Urban Forester & ISA Certified Arborist
The City of Edmonton, Asset Management and Public Works
River Valley Forestry and Environmental Services
Email: trevor.thistle at edmonton.ca
Ph: (780) 944-7833
Fax: (780) 496-4978
Cell: (780) 913-5893

-----Original Message-----
From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net] On Behalf Of Susan Murray
Sent: Monday, March 28, 2011 10:13 AM
To: Canadian Urban Forest Network
Subject: Re: [CANUFNET] Planting depth

I agree with the majority of writers. Planting too deeply here on the west coast is problematic. I have been teaching students to  plant trees at a depth that exposes the top most root as per Gilman's work.
________________________________
From: canufnet-bounces at list.web.net [canufnet-bounces at list.web.net] on behalf of Philip van Wassenaer [pwassenaer1022 at rogers.com]
Sent: Monday, March 28, 2011 8:28 AM
To: 'Canadian Urban Forest Network'
Subject: Re: [CANUFNET] Planting depth

I am with Gilman on this one. Too deep almost always causes problems, a little shallow, hardly any. That is coming back anecdotally here too.

Philip van Wassenaer, B.SC., MFC
1248 Minnewaska Trail
Mississauga, Ontario
Canada, L5G 3S5
Tel:  (905) 274-1022
Cell: (647) 221 3046
Fax: (905) 274 2170
[cid:869135919 at 28032011-2418]

www.urbanforestinnovations.com<http://www.urbanforestinnovations.com/>

From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net] On Behalf Of Ian Wilson
Sent: Monday, March 28, 2011 10:52 AM
To: Canadian Urban Forest Network
Subject: Re: [CANUFNET] Planting depth

Thanks.  In my view Gilman is correct.  In the last several years we have been removing lots of excess soil from the root ball and haven't seen any issues with root crown injury.

Ian Wilson
City of Kelowna

From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net] On Behalf Of Braaten, Lorilee (IS - Parks)
Sent: Monday, March 28, 2011 7:21 AM
To: 'Canadian Urban Forest Network'
Subject: Re: [CANUFNET] Planting depth

Dr. Hannah Mathers stated at the SNLA conference that the root shank (area of exposed root tissue that results from production practices) should never be exposed above the soil line because it may be the cause of increased crown injury. She explained that it may not be cold hardy, may be prone to sunscald or easily injured by herbicides. I have not seen any increase of injury to this exposed root crown area and can not justify changing our planting practices when I have seen the issues of planting too deep.

From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net] On Behalf Of Ian Wilson
Sent: March 25, 2011 1:58 PM
To: canufnet at list.web.net
Subject: Re: [CANUFNET] Planting depth

I'm familiar with the Gilman work, what is the other view you mentioned?

Ian Wilson
City of Kelowna

--------------------------
Sent from my BlackBerry Wireless Handheld

-----Original Message-----
From: canufnet-bounces at list.web.net <canufnet-bounces at list.web.net>
To: 'canufnet at list.web.net' <canufnet at list.web.net>
Sent: Fri Mar 25 12:12:53 2011
Subject: [CANUFNET] Planting depth

Hello everyone,

I have recently attended to two seminars, one with Dr. Ed Gilman and one with Dr. Hanna Mathers.  The two have very different views on planting depth.

I would like to hear others opinions on planting trees at the same depth as previously planted vs. planting higher (at or near the root flare).  It seems there may be possible problems associated with either practice when planting container or bareroot trees and some issues may be species specific.  We have had good results with planting depth near the root flare and have not experienced any issues because of it.  I am interested in your comments.

Lorilee Braaten

Nursery Technician, Urban Forestry

City of Saskatoon

1101 Ave P North. Saskatoon, Sk.  S7L 7K6

cell: (306)220 6318

fax: (306)975 3034
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.web.net/pipermail/canufnet/attachments/20110328/eb53f15a/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 4122 bytes
Desc: image003.jpg
URL: <http://list.web.net/pipermail/canufnet/attachments/20110328/eb53f15a/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P7290324.JPG
Type: image/jpeg
Size: 6182592 bytes
Desc: P7290324.JPG
URL: <http://list.web.net/pipermail/canufnet/attachments/20110328/eb53f15a/attachment.jpeg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P7290325.JPG
Type: image/jpeg
Size: 5130468 bytes
Desc: P7290325.JPG
URL: <http://list.web.net/pipermail/canufnet/attachments/20110328/eb53f15a/attachment-0001.jpeg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: P7290321.JPG
Type: image/jpeg
Size: 643450 bytes
Desc: P7290321.JPG
URL: <http://list.web.net/pipermail/canufnet/attachments/20110328/eb53f15a/attachment-0002.jpeg>