Poinsettias are susceptible to stem and root diseases if the soil is heavy and retains excess moisture. Soak the soil well, then allow all excess water to drain away. Place the plant in a warm, sunny spot for renewed growth. Keep the humidity high to encourage rapid new growth. After frost danger is past, sink the pot into a protected and sunny bed.
Light shade is ideal during the hottest part of the day.
Lift the pot occasionally to prevent root growth into surrounding soil. If the plant becomes root bound, repot it into a larger pot. Watch for insects and control them promptly. Keep the poinsettia actively growing all summer by watering and fertilizing regularly. When the top soil feels dry, liberally apply water, and allow the excess to drain away.