Dianthus? Weed? Or something completely different? I'm stumped, and so are my local gardening friends, including the person who can usually identify plants no one else can.
Maybe if it was blooming I could tell. Or maybe the green buds are actually the blooms? These are in mounded clumps about 18 inches tall, in a garden that does have some weedy areas. We aren't sure whether to leave it or dig it. (These plants were there when the new owner bought the property.)
You can click on the photo to enlarge it. If anyone can help me identify this plant, I'd be most grateful!