Lesser celandine—for some, a Bitter Buttercup!
- ---Ilse in Bethlehem
Luckily, Round-Up is not approved for use near water, and I doubt anyone would invite Federal prosecution by writing you that big grant check.
And hundreds of acres?! Removal of such a large number of plants along a river bank in any manner would lead to severe environmental devastation. And for what? To be able to risk replacing a plant that produces pretty yellow buttercup-like flowers and does a magnificent job of preventing erosion with different plants that thrived in a different era and may no longer have what it takes to compete in a world that's been dramatically changed by the presence of humans?
Nature doesn't favor natives—or so called 'invaders'. Nature simply provides a canvas, and the rules of Darwin decide the winners. It's not the same river as when those other plants first flourished; human activity has changed everything about it and the area around it. The best I can suggest is that you establish a nearby area that you can protect with deep edging in which to show off your natives. Any attempts to remove that much celandine will be expensive, time-consuming, immensely destructive to the environment, and run a high risk of failure.
BUT you might be able to get it out of some small areas to help establish that refuge without causing too much damage. There is a new class of alternative broadleaf herbicide that uses Iron as its active ingredient—and it's specifically labeled for use on this plant (although the label just calls it "creeping buttercup", they clearly mean lesser celandine). Just go slowly, and try and keep it away from that priceless waterway as much as possible, as all herbicides must contain some type of surfactant or they won't work.
Luckily, the surfactants and other inactive ingredients in natural products like this are designed to be gentle on the environment. And iron isn't a hormonal disruptor, like Roundup and many of the other chemical herbicides.
Q. We have a two-fold invasion of lesser celandine; in my planting beds and throughout our new lawn. There's so much in the lawn that we can't spot spray to get rid of it—it would kill the lawn, too. Thanks for any advice!
- ---Jen in Southeastern PA
And then care for the lawn correctly! Your location—in the mid-Atlantic/Northern part of the country—strongly suggests that, unless its zoysia, your lawn is composed of cool-season grasses. So for you, 'correct' means: never cut it below three inches, never cut it during a dry heat wave, and feed it only in the Spring and Fall.
And, as lesser celandine craves moisture, make sure you don't overwater the lawn. If we don't get rain, water deeply, but only once a week. If you see you're making headway, aerate the turf this fall to improve the drainage. (But if your lawn is always wet, you'll have to install drain tiles to fix the problem and start over to keep the celandine out. This weed beats grass any day in a sopping wet environment.)
Dig it out of the flower beds relentlessly. Be persistent, get the below-ground tubers, and be sure to get it out early in the season—before it drops little seed-like things that also grow new plants, just like the underground tubers. (To quote the Modern Herbal website: "In the early summer, when the leaves and stems are dying down, grains drop to the ground, each capable of producing a new plant." )
Then cover any bare ground in the flower beds well with shredded leaves or other non-wood mulch and install deep edging to keep the celandine out. And again, don't overwater!
And please dear listeners and readers, don't go around trying to wipe this plant out everywhere you see it because it's on some hit list. It's not going to go away—and that 'hit list' may well have been instigated by Monsanto or some other herbicide producer. Lesser celandine stabilizes wetland areas brilliantly, and the buttercup-like flowers are breathtaking in the Spring, inspiring literary tributes by the likes of C. S. Lewis, J. R. R. Tolkien, D. H. Lawrence, and—most famously, the poet Wordsworth who wrote:
"Pansies, Lilies, Kingcups, Daisies;
Let them live upon their praises;
…There's a flower that shall be mine,
'Tis the little Celandine."
Eyes of some men travel far
For the finding of a star;
Up and down the heavens they go,
Men that keep a mighty rout!
I'm as great as they, I trow,
Since the day I found thee out,
Little flower! - I'll make a stir
Like a great Astronomer.