great, thank you. do they help with my effort to create a biodiverse insect friendly meadow?
Get rid of as many as you can. They are invasive and almost impossible to remove when they are 3 or 4 years old as they restart from every tiny bit of root. They also produce thousands of long lasting seeds so you already have enough seeds for the next 15 years, if you want some.
In my garden, I keep only a few plants (mashed leaves are great to calm burn from nettle) but I cut the seeds before they mature. I'm 15 years there and I still see dozens of seedlings every spring.
No one eat their seeds in winter so its usefulness for wildlife is much more limited than Daucus carota or Angelica sylvestris.
