Re: Fencing: alternatives to treated lumber(caution)

Pat Elazar (Pat_Elazar@cwb.ca)
Mon, 28 Jun 1999 09:41:42 -0500

Sorry if I contributed to anyone's confusion (except my own!) between Black
Locust (Robinia) & Honey Locust (Gleditsia).

Robinia is the species that is used for fence posts, but the Gleditsia is a
great species for shading a barn yard or providing some shelter in a pasture &
there is a thornless cultivar called Inerma that is pretty hardy. There is of
course the bonus of the edible pods that can fill the hungry gap when the hay is
finished & the grass isn't green yet...

<Just somehting to consider. I forget if the offending tree was a honey locust
or
<black locust. Has anyone else encountered this?
<Hope everyone is having a good summer

"Mary C Kline" <kline.oldhouse@worldnet.att.net> on 06/25/99 09:18:14 PM

Please respond to "Mary C Kline" <MaryCKlineRLA@worldnet.att.net>



To: sanet-mg@ces.ncsu.edu

cc:



Subject: Re: Fencing: alternatives to treated
lumber(caution)

Pat Elazar wrote:
> Maybe I mis-understood the thrust of the post cautioning against using
Locust
> (Gleditsia) as posts because of the thorns?
>
> Fence posts don't usually sucker (unless you use Willow!) at least in my
mud-
> perhaps your land is more bio-active than mine. If you were advising to
use LIVE
> Locust trees as fence posts, then be sure to get the variety Gleditsia
> Triacanthos Inerma- the 3rd name literally means unarmed or thornless.
>

Bill Evans is correct, the Black Locust used for fence posts is Robinia
pseudoacacia, not Honey Locust, Gleditsia triacanthos. I have not heard of
a thornless variety, although propagators have tried to breed one. I had
success controlling the suckers in my fence post lot by hand pruning them
once per year, and by mowing to cut the seedlings. I have observed them to
be less invasive in plant hardiness zone 5 and north. Has anyone in the
upper midwest had the same observation?

One comment on the use of Redwood in fencing - it is not sustainable.

Mary

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