Last mid-summer I bought a steeply marked down Gaura lindheimeri Siskiyou Pink for the bed on the south side of my house, next to a brick wall. I thought given the markdown, it could be justified as an annual to fill in a blank spot for the rest of the summer. To my surprise, it bloomed into late October. The foliage was still living when I put down mulch in early December. This weekend I was delighted to find new growth eight inches tall and filling out nicely. A 2004 Yard and Garden Line article rated it hardy only to Zone 6, others list it for Zone 5. This one even survived last week's late freeze. They are such nice plants, I think I will splurge on a couple more this year, and see if I can triple my good luck.