Anthriscus, Lady Anne's Lace, Purple-Leaved Cow Parsley, Queen Anne's Lace, Wild Chervil 'Ravenswing'

This can invade natural areas and destroy habitat. It also carries a viral disease that infects carrots, parsnips, and celery.
...Read More /> The US National Park Service, the US Forest Service, and the Pensylvania Department of Natural Resources are among the organizations trying to persuade gardeners not to plant this species.

A Massachusetts state prohibited plant, and in Washington, a class B noxious weed. A recent infestation in Vermont has gathered a lot of media attention.

Hardy to Z3a

http://www.dcnr.state.pa.us/cs/groups/public/documents/docum...

I just wanted to mention that I grow this in zone 6 with no problem for the past few years. It will reseed but you can cut the stems off ...Read Morebefore the seeds mature. It has been growing true to seed with dark foliage unlike Eupatorium rugosum 'Chocolate' and the seedlings have been easier to pull. I don't do well with the dark cultivars of cimifuga and this makes a very good substitute. Cut down after flowering or once seed matures if that is your aim. Foliage will grow back neatly. It looks like it would behave as a biennial but it isn't. My soil conditions are sandy and fast draining. Summers can be hot and humid at times.

I've had this plant happily growing in a very dry, part shade location for about 5 years now. It self seeds but not agressively so I get ...Read Morea new plant or two spring up every year.