This article by Fleuriste Atropa Belladonna, a Montreal florist, explains the basics of Poinsettia Care and how to keep this classic thriving for the Holidays, and includes light, temperature, watering, humidity, etc.
The poinsettia may be the unofficial flower of winter, but beneath its festive glow is a warm-weather beauty from Mexico that simply wants one thing: steady comfort. Treat it kindly, keep its roots just right, and this Euphorbia will reward you with brilliant colour all season long. Here’s how to keep yours happy with a few simple steps.
How to Care for a Poinsettia
1. Light: Bright, Indirect & Consistent
Poinsettias keep their colour best with plenty of bright, indirect light. A spot near a window (without drafts) helps the bracts stay vibrant longer.
- Avoid dark corners — low light encourages leaf drop.
- Direct harsh sun isn’t ideal either; choose filtered light; unless if you’re a fellow Montrealer, you can probably get away with direct sun, in my experience the sun is weak enough up here at this time of year.
2. Temperature: 15–21°C (60–70°F)
Poinsettias love stable temperatures.
- Keep them in the 15–21°C (60-70°F) sweet spot.
- Avoid cold drafts, open doors, and heat vents — they’re sensitive.
- Never buy a plant displayed outside in winter; it may already be cold-damaged.
- Always ensure the plant is well wrapped during transport, especially in Montréal winters.
3. Watering: Moist, Not Soggy
This is the part most people get wrong.
- Keep the compost moderately moist.
- Do not let it fully dry out — they dislike drought.
- Do not let it sit in water — they dislike soggy roots even more.
- Remove decorative foil when watering so excess water can escape.
Pro tip:
Use our weight trick
Lift the pot before and after watering to learn its “light” and “heavy” states. This becomes the easiest way to know when your poinsettia truly needs water.
4. Humidity: Higher Is Better
As a tropical species, poinsettias appreciate moist air.
- A nearby humidifier or a pebble tray works well.
- Avoid placing the plant close to radiators or fireplaces.
5. Final Checks
Leaf Drop
Usually caused by:
- Overwatering
- The room being too cold
- Insufficient light
Crispy Leaves or Colour Fading
- Too dry, too hot, or drafts
- Check humidity, watering, and location
Droopy Appearance
- Soil got too dry at some point
- Water thoroughly once, then monitor with the weight method
Where Poinsettias Come From
- Origin: Mexico
- Botanical Genus: Euphorbia
- Related to many succulent-like species and known for its colourful bracts rather than petals.
Final Notes
Keep it warm, keep it bright, keep it consistently hydrated, and your poinsettia will glow beautifully through the holidays. With steady care, many people even keep theirs into spring and summer.
Further Reading:
For growers, researchers, or anyone curious about how professionals manage poinsettia health, Purdue plant pathologist Dr. Janna Beckerman offers a deeper look at poinsettia protection and root health in this GPN article. Likewise, if you want a deeper look at the Holiday, read our overview on Christmas plants and traditions. Lastly, if you’re also looking for Cyclamen tips, another common Holiday gift, read about Cyclamen plant care.




