This past fall I tossed some old seed out in various beds and this grew. It recently started blooming:

Didn't know what it was, but after doing a bit of Google-fu, figured out that it is Trachelium caeruleum, "Perennial Blue Lace Flower" aka "Blue Throatwort". Has anyone else grown it? It's doing well and I'm wondering how it'll take the summer. It is a Mediterranean plant, so I'm hoping it'll do fine.

Bonus that it's a butterfly attractor, too.