Looks a lot like yarrow. Those five-leaflets might belong to one of the potentillas (but not Potentilla recta which has 7 leaflets).

Dogfennel?

Here is a link that might be useful: Eupatorium capillifolium

It's not yarrow.

Looks to me like Anthemis cotula, mayweed.

Here is a link that might be useful: {{gwi:154941}}

Looks like it could be a poppy to me.
{{gwi:154943}}

This post was edited by olychick on Sat, Mar 29, 14 at 20:27

It doesn't look like yarrow, dogfennel, and probably isn't mayweed (too early for zone 7). My bet is on one of the wild chervil species like Chaerophyllum procumbens. If so, it should have tiny white flowers any day.