I just noticed this emerging in my zone 6a garden. Not sure what it is/ Anybody have any idea?
Google "Mugwort" and see if that matches your plant.
Several other things resemble mugwort, so I am not sure. However, if that is it, it's evil. Get rid of it. It spreads by extensive rhizomes. Pull it up; it's immune to most weedkillers. Get every little bit of it, and then check multiple times over the growing season and pull it whenever it rears its horrid little head.
I have a bad mugwort problem and it's nearly impossible to get rid of once it's established.