"Sunpatiens is a hybrid bred by the Japanese seed company Sakata. It is a careful combination of wild “traditional” impatiens (from a plant species native to Indonesia) with the larger, heat-loving Impatiens hawkeri, native to New Guinea. The result is a variety of impatiens that thrives in full sun and hot, humid weather, and blooms straight through from spring to the first freeze."

Sunpatiens are normally grown as an annual.
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“True” annuals die after producing new seed at the end of year one. However, if you keep begonias, coleus, fuchsia and most houseplants above freezing, they will overwinter. Impatiens and Sunpatiens are both technically a perennial, but they must be kept in temperatures above 40 degrees. Otherwise, they will die off. We live in a part of the United States where the weather gets very cold. Although Sunpatiens are not normally considered to be a houseplant, I've still decided to try to keep this plant growing for as long as I can.
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We had our first frost on October 7th and our first hard, killing freeze on October 17th. In between (right up until November 10th), we had day after day of unseasonably warm weather in the 70's & 80's. The above Sunpatiens had to spend only the isolated, two, cold nights inside during that month long timespan. Long after we had taken all the hibiscuses indoors, the Sunpatiens were able to remain outside to brighten up the Fall deck.

However, a week ago, everything changed. The outside weather went from being unseasonably warm to becoming unseasonably cold. My Sunpatiens are now in our Solar Room with heaters running. I've never grown Sunpatiens before this year. So, I don't know how they'll "winter over". They're still blooming like crazy but look rather leggy. I've read that you can't cut them back.

Nevertheless, the flowers sure are pretty to look at on a cold, gloomy day.