There is a decent argument for pulling them in the United States. They vigorously displace native wetland plants which have evolved to feed local fauna (like pollinators). Pulling doesn’t eliminate them, with their tiny tubers everywhere, but it does slow their spread.

Maybe it went dormant and is now breaking dormancy… good luck!

Good luck! They are cute!

That’s impressive! Now I want to count mine (I am bad at counting)