Every December, poinsettia plants (Euphorbia pulcherrima) are given or received as gifts. These beautiful red plants have become a sign of the holidays, but usually are thrown out as soon as the holidays are over. They are specifically grown for the holidays (those bright red leaves just scream Christmas,) but what if you could keep them growing all the way into the summer season?
Lets start at the beginning. When poinsettia plants are first purchased they should be in prime condition; dark green foliage, be well shaped and have bracts free from defects. The soil should be kept moist at all times, but not excessively wet. When the soil begins to feel dry, apply enough water so it dampens the surface but also runs through the drainage hole. In between waterings do not let the leaves begin to wilt. Poinsettia plants should also be kept away from cold drafts and excessive heat- this can also cause the foliage and bracts to rapidly wilt.
Thank you to CCE for the original information. You can read more here.