I direct sowed a lot of seeds in my garden last winter, and this one did well because it's everywhere. I planted everything in large clumps, so I am pretty sure it's a flower because it's located in one section of the garden only.

Any idea what this is?

Seeds I put down:
Purple Verbena (Brazilian?)
Double Sunburst Coreopsis
Prairie Aster
Purple Coneflower
Swamp Milkweed

If it's too early to tell, no worries. I'm just terrible at identifying seedlings & hoping someone recognizes it. :)