"The best time to grow Brussels sprouts in Florida is during the winter. When planted in October through December, there is sufficient cool weather in most areas of the state for fair results. At other times of the year, such as the spring, temperatures become too high for quality sprout production."
2015: Scores of eastern U.S. cities to shatter Christmas Eve warm weather records... The anomalous warmth forecast Christmas Eve fits right into a December that will rank as warmest on record for much of the northeastern U.S. into the Mid-Atlantic. - The Washington Post