Poinsettias - a holiday classic! Poinsettias are native to Central America and as such they prefer warm temperatures between 65-75 and do not like cold drafts. When purchasing a Poinsettia and bringing it home, be sure it's wrapped up in paper for protection from the cold. Wilting leaves are a sign they've gotten too cold. They'll like a bright location in the house and they don't like a lot of water. Allow the soil to dry between watering and don't let them sit in water. Leaves turning yellow or falling off is a sign of overwatering. Poinsettias are mildly toxic to dogs and cats if ingested.