Wish you could have seen my friend Millie's collection of poinsettias. She had at least 14, all rescued from neglected corners after the holidays.
They're really easy to encourage to bloom again. Place in a sunny, warm spot with temperatures between 65 F at night to no more than 80 F during the day. Keep watering when soil feels dry and give it a good fertilizer at half the strength of the recommended dose. Around Labor Day, tuck the plant in a dark closetor cover with a empty box covered in black plastic. After about 8 weeks, the leaves would start to turn red again. It takes 2-4 months for full color.