Newcomb’s Wildlfower Guide doesn't call it "non-native" because its presence in North America pre-dates known travel records. Did it come here on its own or did people bring it?
Native Americans use heal-all as medicine so perhaps the first Americans brought it across the land bridge from Asia. And now it's here to stay.
Watch for Heal-all blooming throughout the summer.
(photo by Dianne Machesney)