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Old 05-25-2011, 06:34 PM   #1
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Default Pycnanthemum virginianum Common Mountain Mint

Does anyone have any experience with this ground cover? I have planted three acquired from Prairie Moon Nursery with the hope that it can compete with (and defeat?) the Creeping Charlie which is the scourge of my yard.

The write-up on it couldn't be better, and Prairie Moon warned that it was aggressive - which would be needed for competition with Creeping Charlie.

Common Mountain Mint (Pycnanthemum virginianum)
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Old 05-25-2011, 09:10 PM   #2
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I've got it. I haven't noticed that it's terribly aggressive. Of course, it's competing with swamp milkweed, obedient plant, New England aster, lanceleaf aster, and Canada goldenrod - so it's kept in check by some pretty aggressive species. I wouldn't call it a "ground cover" exactly - the plants are medium height, maybe three feet. It's actually a nice-sized plant for a small garden. The Joe Pye, NE aster, milkweed, and a lot of the other things I have really get tall. I sort of wish the mountain-mint spread around a bit more. Good pollinator species.

Not sure if it will outcompete creeping Charlie, since they occupy different strata, so to speak. It doesn't grow extremely densely. I have Virginia creeper in some shady spots where creeping Charlie creeps - and that does a pretty decent job keeping it in check, although I still have to stop and rip some out every now and then.
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Old 05-27-2011, 08:59 AM   #3
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Originally Posted by amelanchier View Post
I've got it. I haven't noticed that it's terribly aggressive. Of course, it's competing with swamp milkweed, obedient plant, New England aster, lanceleaf aster, and Canada goldenrod - so it's kept in check by some pretty aggressive species. I wouldn't call it a "ground cover" exactly - the plants are medium height, maybe three feet. It's actually a nice-sized plant for a small garden. The Joe Pye, NE aster, milkweed, and a lot of the other things I have really get tall. I sort of wish the mountain-mint spread around a bit more. Good pollinator species.

Not sure if it will outcompete creeping Charlie, since they occupy different strata, so to speak. It doesn't grow extremely densely. I have Virginia creeper in some shady spots where creeping Charlie creeps - and that does a pretty decent job keeping it in check, although I still have to stop and rip some out every now and then.
Yes, those are tall companion plants that may be keeping it in check??
This afternoon I have a shipment due from Prairie Moon that has as one of its selections, Viola striata, which is said to be aggressive. It also likes shade to partial sun. Perhaps this will give "Creepy" Charlie a run for his money??? Any experience with it?
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Old 05-27-2011, 09:16 AM   #4
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Not familiar w/ that one. It's probably impossible to wholly get rid of CC purely through competition, but if it can be held in check, that's really what you want.
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Old 05-27-2011, 09:42 PM   #5
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Originally Posted by jack View Post
Yes, those are tall companion plants that may be keeping it in check??
This afternoon I have a shipment due from Prairie Moon that has as one of its selections, Viola striata, which is said to be aggressive. It also likes shade to partial sun. Perhaps this will give "Creepy" Charlie a run for his money???
Quote:
Originally Posted by amelanchier View Post
Not familiar w/ that one. It's probably impossible to wholly get rid of CC purely through competition, but if it can be held in check, that's really what you want.
First off, I had to do an image search of "creeping Charlie" ...afterwards I realized I do know it--but I know it as "ground ivy".

Now, I'm dealing with a totally different invasive, but I've started a strategy that I call "remove, replace, and edit"... I attempt to remove the invasive (knowing it will come back), I plant some natives that are strong enough to compete with it, then edit out the invasives that do come back--that way I have something to weed around. Also, over time the native (in theory anyway) will begin to out compete the invasive that is periodically weeded out or even just cut back. So far, I have a few "islands" of my native plants--I only began this experiment last fall, and did a bit of "editing" today.

Hope this might be helpful.
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