Answer: It is too late in the season to cut your poinsettia back and still hope to have color in December, so you may simply want to enjoy your leggy plant this season and cut it back after it has finished flowering. If you pinch out the growing tips in the spring and early summer, your plant will be full and bushy instead of tall and leggy. If flowering doesn't matter to you this year, prune the entire plant down to 6-8 inches. You'll get new growth from below the cuts but there's probably not enough time for the new stems and foliage to bring you that lovely red color this winter. Best wishes with your poinsettia.
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