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Mahonia aquifolium invasiveness?

Posted by Toronado3800 Z6 St. Louis (My Page) on
Sat, Feb 5, 05 at 23:31

Hello all, just visiting from the tree forum. I was considering planting a couple of these in the shade under my walnuts where the honeysuckle used to be. On one government website it made confusing mention of Mahonia being an invasive barberry in 35 states. I could find no other reference to this and in fact a college hort. site said it was slow to establish.

Any idea who'se right?

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RE: Mahonia aquifolium invasiveness?

It is native to much of the west coast and while it can be an agressive spreader in its natural environment, I'd certainly not consider it invasive and it IS much slower to establish in a cultivated garden. The only hits I could find referring to invasiveness are in European, British or Australian sites and I know it can be problematic in those areas. May suffer dieback and foliar damage in colder climates and is less likely to produce a lot of fruit, so its invasive potential in your area should be limited. Placement in dry shade will also limit its spread by suckering.

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