I've been curious all spring to see what this is. It looked different from all the weeds, so it escaped the weed killer.
It's getting close! Looks like I'll be able to look it up in the next week or so. Of course, if it's not a wildflower, it won't be in the wildflower book. Then I'm stuck. We'll see.
I've also been using this pink stuff liberally in bouquets. It lasts well in water and looks really good.
It's on the south side of the house, in the old raised bed area. It's about 5 feet tall. I briefly thought it was hollyhock, but now I think it's musk mallow. (Except musk mallow is 1-2 feet tall.) I think I want to keep this stuff coming back.