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[quote=Anonymous]Echoing others' who have noted the difficulty controlling. Removing by hand needs to be meticulous. One suggestion I read was to dig deep down like 6 or 7 inches and take up all the dirt and celandine, rolling it up as you go like sod. That way, the little bulbs fall on existing ground that you're going to be digging up.

It's important to also NOT COMPOST it but secure it in a black plastic trash bag and discard in your regular garbage. Otherwise, it will re-sprout and continue to spread.

Timing glyphosate application is important, too. Early spring before the plants are at 50% bloom. Repeating the next year or so may be required; but keep hitting it at the right time every year to control it.

DO NOT MOW it - that merely spreads it around. Animals and people walking through it help spread it. We have it in a public alleyway behind our property and it is quickly advancing.

To try to keep it from infiltrating our property, I've planted some golden ragwort. It's native, fairly fast and dense early spring grower. It's also very pretty in bloom en masse as it spreads. I couldn't find glyphosate in regular stores; so I ordered some online. It didn't arrive (and I didn't try to find it) early enough for this season; but I am definitely going to try applying it next spring on the plants I find in the alleyway directly behind our property and on the corners of the adjacent properties where it has become a thick mat.

Native (purple/blue) violets are also "early springers" and, at least in my garden beds, aggressive and thick mat-forming. I'm also trying to transplant a few of those out to the alley to see if they will compete. Unfortunately, they look just like the celandine until they bloom; but once they do bloom, I'll at least know to try not to spray them and it will give me a visual on their effectiveness as the yellow celandine blooms. Some online commentaries suggest they won't succeed, but I think any early spring native with a dense root system is worth a try.

I also posted a public service announcement to our neighborhood listserv. Not everyone is on it and not everyone will care; but increasing awareness and getting more people involved in fighting the lesser celandine battles can only help. Same thing with asian spotted lanternflies....

OP, thank you for being a responsible steward and for being concerned. Good luck! Any bit of success is helpful![/quote]

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