Answer: I believe your are referring to mandevilla, which is a tropical plant. It is not rated to survive your winters without protection. I wouldn't recommend storing it in an unheated garage. If space is a problem you can also bring it indoors for the winter as a houseplant. It should be happy with temperatures between 65F - 70F indoors, bright light but not direct sunlight, ample water spring and summer, little water in the winter, lots of humidity, so mist the leaves every few days.
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