I doubt it will survive your winter outside so don't think it will be a problem for you, apart from not being around too long. It is a south african sun lover so don't put it in the shade.
Brian

Linda,

I have about a dozen of that very variety and they are not invasive. I planted mine last May or so as little tiny starts and they came along nicely and bloomed profusely until late Oct or so. They got to be about 12"-18" wide and 8-10" tall and I was very pleased with them. I'm considerably milder than you and I did get some winter die back but they look to be making a fine recovery. Mine aren't in my rock garden though, I have them planted at the base of a block wall in a zigzag pattern alternating with dragon's blood sedum.

I plant them every darned year. They are annuals for me, and this year, not even that.

Thanks for the info, guys. I am *much* reassured. Sounds like they will certainly be annuals here, too.

The person who bought them is usually downright *rigid* about only getting hardy perennials, and the plant label had no zone info at all. I figured she had asked the vendor.

It should be happy here, though. It is in a woodland-type rock garden that leads into the woodland area, but it is in a full sun/80% sun spot. But just a few feet away, into more partial sun, were some of my more sensitive endangered natives that I have been nurturing..... I was very nervous. I appreciate the information. Thanks.