Return to the Trees Forum | Post a Follow-Up

 o
Girdling roots on a dawn redwood

Posted by kato_b z6 NEPa (My Page) on
Sat, Feb 23, 13 at 21:30

I love my "Goldrush" dawn redwood, maybe a little more than I should, it's just an awesome tree. So I look at it a lot.


Follow-Up Postings:

 o
RE: Girdling roots on a dawn redwood

This summer I noticed the root flare wasn't really coming along evenly so I poked around a little and found this root choking the one side.


 o
RE: Girdling roots on a dawn redwood

Here's another view. I cut the root out and don't think it will be a problem, I just thought it was a nice example of what a girdling root looks like. Hopefully there aren't any more deeper down, I'm a little worried about it having some kind of club-root down below, but I think there are enough good roots on top to take over. Probably a pot bound liner at some point.


 o
RE: Girdling roots on a dawn redwood

to my eye.. it looks EXACTLY the circumference of a one gallon pot ... of course i have no scale.. care to speculate ...

now.. HOW did you accomplish the cut.. w/o scarring the trunk ???

ken


 o
RE: Girdling roots on a dawn redwood

Do you notice any slow growth, discoloured needles, lack of over all vigour?


 o
RE: Girdling roots on a dawn redwood

Growth on the tree still looks fine, what I noticed was that only one side of the trunk was developing a root flare, the other side went straight down.

The scale might be a little deceiving, I have to head out there through the mud and slush and take another look. Maybe it is a one gallon pot size..... But if I admit to that then I also admit the root was my fault - since I should have seen it when I planted it!


 o
RE: Girdling roots on a dawn redwood

Excellent job, Kato, and excellent postage of such as well!

I was once lead to believe that in many cases, cutting girdling roots will not work because new roots will form right where the cutting was done and will occupy essentially the same location sooner than later. But....I'm not sure I believe that, for the simple reason that while the regrowth may be fast, the trunk will also have the same amount of time to add girth, and that at some point, the root will not have the ability to cause much constriction.

In any case, I like what you did there and I think it well worth it.

+oM


 o
RE: Girdling roots on a dawn redwood

Thanks for the comments! Here's what it looks like today. Ground is still frozen so I couldn't investigate any deeper, I think I cut out the root some time in October or so but the imprint from the root is still just as obvious...
Looking at it today I would guess the root formed in maybe a 5 inch pot? btw I cut it out with pruners, the root was only about a half inch diameter so it still cut pretty easy.


 o
RE: Girdling roots on a dawn redwood

Maybe it is a one gallon pot size..... But if I admit to that then I also admit the root was my fault - since I should have seen it when I planted it!

==>>> PSSST .... we have all been here... we just dont admit it in public.. rotflmbo ....

ken

ps: it doesnt matter if it roots from the cut +om.. the roots will go the proper direction .. down ..... new roots wouldnt start the strangling again ...


 o
RE: Girdling roots on a dawn redwood

Uh, not so, Ken. In exhumed samples I've had the opportunity to look at, new rootlets formed at more or less right angles to the cut surface but soon reoriented themselves in virtually the same space of the removed section. Probably, a wide range of new orientations occur. There's nothing magic about the original root location, but still, they do often enough end up going right back there.

What I'm saying is that especially with fast-growing species, like Metasequoia, stem girth will increase fast enough to alleviate any tendency towards new root girdling. Or maybe not!

+oM


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Trees Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here