Answer: As the name suggests, Mexican heather is native to Mexico and Guatemala, where they enjoy warm winters. These plants are not winter-hardy and should be kept in a coldframe or greenhouse where they won't be subjected to temperatures below 45F degrees. You can keep your Mexican heather indoors during the winter months, keep in a cool, but well-lit spot. In the early spring move it to a warmer spot and provide some direct sunlight each day. Pinch your plants back and water sparingly during the dead of winter, but increase water when you move it to a sunny spot. When the weather warms, you plants can go outdoors again.
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