It grows all over around here (Vancouver, Canada) on in disturbed soils - two plant books I have say it was originally from Europe. I've seen it growing in sidewalk cracks in my neighbourhood, as well as alongside forest trails.
Has a nice, rich, earthy/woody flavour. I ate it today in a beet soup (from a local farmer). I wild harvested some earlier this year that I dried and used for tea. Something about the unique flavour really attracts me to this plant.