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["Idell Weydemeyer" <iwgarden@earthlink.net>]

-- I have read that Goumi is not nearly as invasive as autumn olive but do
not have direct experience with that since neither my autumn olive nor my
goumi has produced seedlings-- ever-- but as I said earlier-- birds could
spread it to a riparian zone --although I have seen none anywhere near here
--but then again, as far as I know very few grow it around here.

In areas that it is called invasive, it can be a huge problem, apparently. 


Idell zone 9b

 
-----Original Message-----
From: nafex-bounces@lists.ibiblio.org
[mailto:nafex-bounces@lists.ibiblio.org] On Behalf Of Elizabeth Hilborn
Sent: Friday, March 28, 2014 3:48 AM
To: nafex mailing list at ibiblio
Subject: Re: [nafex] Elaeagnus angustifolia

Mary, I do not think that humidity is the key variable.  I live in a 
very humid zone 7. They are intrepid invaders here in both disturbed and 
intact forest and grasslands, I manage them, but cannot eradicate them.

I would not plant one on purpose.

Betsy Hilborn
Zone 7a (again!), NC

On 3/27/2014 3:02 PM, Mary Yett wrote:
> Whether or not a plant becomes invasive depends a lot on the local
climate.
> Here on Manitoulin Island, Ontario in a humid zone 4 with a maritime
> climate ( cool summers), none of the Eleagnus spp have ever become a pest
> sp. In hotter, southern Ontario, there are areas where Autumn Olive, for
> example , has naturalized as a pioneer sp.
>
> In humid climates,these pioneer spp typically establish only on disturbed
> and/or infertile ground. Their role in the natural succession of
> temperate,humid ecosystems is to fix nitrogen from the air, improve the
> soil, provide a bit of shade for other, taller trees to germinate in and
> then die out when the taller trees shade them out.
>
> Our dominate agriculture system keeps succession at the ruderal stage
> (early annual weeds, ie annual crops, and pioneer woody spp) by the use of
> constant disturbance (plowing annually,mowing roadsides, etc). This
creates
> good habitat for pioneer spp, both native and introduced.If left alone in
a
> temperate humid climate, Eleagnus spp just do their work and then fade
away
> and do not have a negative impact on the native ecosystems.
>
> I realize that in a dry climate, esp with poor soils, the picture can be
> very different.
>
>
> On Thu, Mar 27, 2014 at 1:00 PM, Robert Stanton
> <robert.l.stanton@gmail.com>wrote:
>
>>> Just out of curiosity, does anyone on this list consider the invasive
>>> potential of the plants they use?  I dedicate a significant portion of
my
>>> time to removing autumn and Russian olive from landscapes here in the
>>> midwest, and it's always disheartening to hear others actively planting
>>> more of what needs to be removed to maintain diverse natural plant
>>> communities.
>>>
>>> Robert
>>> __________________
>>>

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