I rarely have plants overwinter well-even perennials. But last year my dianthus came back! I have it in a large grow bag where it is being overrun by 2 columbines. A campanula is slowly closing in too. I'm curious to see if it comes back next year considering how shaded it was. It did bloom & I let most of the seed drop just in case it doesn't survive.
Gaillardia lasts 2-3 years for me at best. Not a great reseeder either but the bees aren't that fond of it so that may explain it.
