Yay, my tree dahlias bloomed before they froze! The open buds pictured below, which were looking happy on the day I took these pics, are fairly withered this morning. Today's remaining unopened buds look like they could still open. Judging from the frosty feeling outside this morning, I'm not betting on that.
The lighting wasn't great when I shot these pics, but I couldn't really sit around all day waiting for better light.
My tree dahlias are so tall that turning on my flash didn't help much.
Lower leaves look a little funky. A fussier person than I would probably get on a ladder and remove them.