Ask a Question forum: Best control for agressive artemisia?

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Name: Reid
North Branch, MN (Zone 4b)
Garden Ideas: Master Level Celebrating Gardening: 2015
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Anderwood
May 14, 2014 5:02 AM CST
I posted a comment in the weeds podcast, but here is a picture. This agressive thing with runners is taking over my perennial garden. If consists of mainly prairie plants with dome bulbs thrown in. Is the only option to rip it out?

Thumb of 2014-05-14/Anderwood/af83a0
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Name: Kent Pfeiffer
Southeast Nebraska (Zone 5b)
Charter ATP Member I was one of the first 300 contributors to the plant database! Plant Database Moderator Plant Identifier Region: Nebraska Forum moderator
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KentPfeiffer
May 14, 2014 6:17 AM CST

Plants Admin

If you are careful, you might be able to kill it with herbicides without damaging too many of your other plants. Otherwise, it is going to be extremely difficult to control.

Other than irises Hilarious! , my flower gardens consist almost entirely of native prairie and woodland plants. But, I've learned the hard way that some of them aren't very suitable for small spaces. They need room to roam. Smiling The rhizomatous species, in particular, deserve careful consideration before planting.
Name: Reid
North Branch, MN (Zone 4b)
Garden Ideas: Master Level Celebrating Gardening: 2015
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Anderwood
May 14, 2014 7:56 AM CST
The rhizomatous species, in particular, deserve careful consideration before planting.[/quote]

Yeah, that was definitely a beginner's mistake. I had no idea Confused I started out with about 10 plants five years ago. I am very hesitant to use weed killer.

Thanks for your thoughts!
Name: Elaine
South Sarasota, Florida (Zone 9b)
The one constant in life is change
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dyzzypyxxy
May 14, 2014 8:16 AM CST
As an alternative to chemical herbicide - at this time of year when the sun's getting more intense, you could try spreading clear plastic (painters drop sheets) over the infested areas and letting the sun burn the tops. You may have to do it a few times, but if you keep killing the leaves, the roots will eventually give up.

Up there in MN your other plants could benefit from the extra warming the plastic will give the soil, too.
Elaine

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
Name: Reid
North Branch, MN (Zone 4b)
Garden Ideas: Master Level Celebrating Gardening: 2015
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Anderwood
May 14, 2014 11:35 AM CST
@dyzzpyxxy Thanks. Most of my perennials are up right now. Should I still do it?
Name: Greene
Savannah, GA (Sunset 28) (Zone 8b)
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greene
May 14, 2014 12:16 PM CST
We discovered this one by accident when we uncovered a small raised bed and set aside a large pane of glass. Placing glass over the unwanted vegetation will kill most anything in a few weeks..
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~~"Leaf of Faith"
Name: Elaine
South Sarasota, Florida (Zone 9b)
The one constant in life is change
Cat Lover Master Gardener: Florida Tropicals Multi-Region Gardener Vegetable Grower Region: Florida
Herbs Orchids Birds Garden Ideas: Level 2 Garden Sages Celebrating Gardening: 2015
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dyzzypyxxy
May 14, 2014 3:27 PM CST
Reid, if you can spread and weight the plastic only to cover the Artemesia plants, and leave the perennials uncovered, that will work. Don't cover the foliage on anything you don't want killed.

The clear plastic does the same thing as greene's pane of glass, (only it's flexible). Cooks the top growth. Do it on a clear, sunny day, leave it on for a day or two, then remove so you can water the other plants. When the burnt plants start regenerating, put the plastic on for another day. Repeat as necessary. Don't leave it on.

It will be a pain for a few weeks, but worth it and cheaper than a chemical solution, I think.
Elaine

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
Name: Reid
North Branch, MN (Zone 4b)
Garden Ideas: Master Level Celebrating Gardening: 2015
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Anderwood
May 15, 2014 8:20 AM CST
Thanks everyone. I will wait until I know where all of my perennials are, and then put down plastic.

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