How to Make Poinsettias Rebloom Next Christmas

Post‑Holiday Care

After the holidays, treat poinsettias like any houseplant: bright light, water when top soil dries, feed with liquid fertilizer. When colorful bracts fade and drop, cut stems back to just below the old flowers and keep growing.

The Rebloom Challenge

Getting them to color again takes strict light control. Space limits mean you may not rebloom all plants.

1. Spring: Once nights stay above 50°F, move pots outdoors to bright, indirect light. They’ll stay green all summer.
2. Midsummer: Prune back by ½‑⅓. Repot in same or slightly larger pot with commercial mix. Fertilize during new growth.
3. Late Summer: Bring indoors before nights drop below 50°F.
4. Sept 21 – Oct 31: Critical darkness period. 14‑15 hours of uninterrupted darkness daily (e.g., 5 PM – 7‑8 AM). Cover with opaque box or place in pitch‑black room. No light leaks—not even car headlights. Night temps ~65°F.
5. Early November: Color should appear. End darkness routine; give bright indirect light.
6. Late November: Bracts fully colored—enjoy through the holidays!

Greenhouse growers use thick black cloths to achieve total darkness. Consistency is everything.