getting rid of lessor celandine - Ask Extension
There's bunch of this growing in my yard. Of course, it's disappeared now. I did apply some glycophosphate (sp?)/roundup near the end of it's appear...
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getting rid of lessor celandine #871175
Asked June 02, 2024, 4:23 PM EDT
There's bunch of this growing in my yard. Of course, it's disappeared now. I did apply some glycophosphate (sp?)/roundup near the end of it's appearance this spring. Pretty sure I didn't get all of it. Can I plant ground cover over it now, or do I have to try to dig it up first, then replace the dirt (that's a lot of dirt!)
Or can I just put dirt on top (like 2 inches?) Hoping I don't have to wait until next year to take care of. Please advise of options.
Franklin County Ohio
Expert Response
Teresa
Here is the information I think you will need.
Due to the short half-life, you will not need to wait a year.
All the best, Roxanne
How Soon Can I Replant After Using Roundup Weed & Grass Killer Products?
Here is the information I think you will need.
Due to the short half-life, you will not need to wait a year.
All the best, Roxanne
How Soon Can I Replant After Using Roundup Weed & Grass Killer Products?
Thanks, do I need to confirm the lessor celandine is dead? That’s my concern – that I plant new groundcover but next spring the lessor celandine pokes through & overtakes it.
Thanks!
From: ask=<personal data hidden> <ask=<personal data hidden>> On Behalf Of Ask Extension
Sent: Monday, June 3, 2024 10:38 AM
To: Christina Povenmire <<personal data hidden>>
Subject: Re: getting rid of lessor celandine (#0141095)
I understand.
According to Washington State extension, "Herbicides which contain the active ingredient glyphosate are effective in controlling (but not necessarily eradicating)
lesser celandine. However, application timing and herbicide concentration must be correct to obtain control. Application
should be made in late winter or early spring when leaves are visible, but prior to full flowering, and when temperatures are above 40°F. Apply a 1 to 1.5% rate of a 53.8% active ingredient glyphosate. An added non-ionic surfactant will improve
herbicide uptake by the plant. Glyphosate will impact other vegetation so try to target only the celandine. It may take 1-2 weeks before the full effects of the treatment are visible. The site should be monitored and retreated in subsequent years, as needed. Herbicides containing triclopyr may also be effective in controlling celandine."
So regretfully, it may take more than one season of eradictation.
If you are planting to plant grass seed, I would wait a season to see if you get regrowth and apply another dose if necessary.
If you need to plant earlier, you could try covering the area with cardboard (overlap edges) and dirt and then seed this fall. This will be more successful than dirt alone, but this plant can go dormant and spring up from the tiniest roots.
https://www.nwcb.wa.gov/images/weeds/Lesser-Celandine-Control_Whatcom.pdf
Roxanne
According to Washington State extension, "Herbicides which contain the active ingredient glyphosate are effective in controlling (but not necessarily eradicating)
lesser celandine. However, application timing and herbicide concentration must be correct to obtain control. Application
should be made in late winter or early spring when leaves are visible, but prior to full flowering, and when temperatures are above 40°F. Apply a 1 to 1.5% rate of a 53.8% active ingredient glyphosate. An added non-ionic surfactant will improve
herbicide uptake by the plant. Glyphosate will impact other vegetation so try to target only the celandine. It may take 1-2 weeks before the full effects of the treatment are visible. The site should be monitored and retreated in subsequent years, as needed. Herbicides containing triclopyr may also be effective in controlling celandine."
So regretfully, it may take more than one season of eradictation.
If you are planting to plant grass seed, I would wait a season to see if you get regrowth and apply another dose if necessary.
If you need to plant earlier, you could try covering the area with cardboard (overlap edges) and dirt and then seed this fall. This will be more successful than dirt alone, but this plant can go dormant and spring up from the tiniest roots.
https://www.nwcb.wa.gov/images/weeds/Lesser-Celandine-Control_Whatcom.pdf
Roxanne
