The length of time your poinsettia will give you pleasure in your home is dependent on
With care, poinsettias should retain their beauty for weeks.
When you have made your poinsettia selection, make sure it is wrapped if the weather is cold. Exposure to low temperatures, even for a few minutes, can damage the bracts and leaves.
Keep poinsettias away from warm or cold drafts from radiators, air registers or open doors and windows. Do not allow them to touch cold windows.
Check the soil daily. Be sure to punch holes in the foil so water can drain into a saucer. Water when the soil is dry. Allow water to drain into the saucer and discard excess water.
Getting poinsettias to re-flower is not easy, but with some patience and care it can be done. A hand-out will be available in the stores to explain how if you wish to try.