Answer: Windmill palms are among the hardiest of palms and are successfully grown in the Pacific Northwest, all the way up to Vancouver, B.C. You can keep your palm indoors over the winter months if you provide supplemental light (they love sunshine, which is hard to come by in the Seattle area during the winter months). Set your palm in a bright room and use a Gro-Lite to enhance natural light. Plant it outside next spring and it should grow well in your garden.
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