Answer: Impatiens plants can live many years in a warmer climate. Trying to overwinter them in Minnesota can be tough, because of bugs such as spider mites. I'd throw the plant out if it's severely infested and the leaves are dropping. For light infestation spray insecticidal soap a few times a week and mist the plants daily. Spider mites don't like misting. Hopefully, you'll get them to make it to spring and be able to put them back outside.
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