Troubleshooting
Poinsettia problems — and how to fix them
Poinsettia (Euphorbia pulcherrima) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Leaf and bract drop
Usually caused by cold drafts, chilly windows, sudden temperature swings, or the cold trip home from the shop. Keep away from doors, heat vents, and fireplaces, and maintain steady warmth above 13C (55F).
Overwatering and root rot
The most frequent cause of yellowing, wilting, and collapse. Let the soil surface dry between waterings, ensure free drainage, and never leave the pot standing in water or a foil sleeve.
Whitefly infestation
Tiny white sap-sucking insects cluster under leaves, causing yellowing and drop. Treat early with insecticidal soap, neem, or horticultural oil and inspect new plants before bringing them home.
Bracts won't recolour
To rebloom, the plant needs about 14-16 hours of complete uninterrupted darkness each night starting in late September or October, plus bright light by day. Any stray light at night disrupts colour development.
Scorched or faded bracts
Harsh direct midday sun or sudden temperature change can bleach and crisp the colourful bracts. Provide bright but filtered light and stable conditions.
Botrytis (grey mould)
Stagnant, overly humid air and water sitting on leaves and bracts encourage grey fuzzy mould. Improve airflow, avoid misting the bracts, and remove affected tissue promptly.
Prevent poinsettia problems before they start
Most poinsettia issues are care-mismatch, not bad luck. Dial in the basics:
Poinsettia problems — FAQ
Why is my poinsettia leaf and bract drop?
Usually caused by cold drafts, chilly windows, sudden temperature swings, or the cold trip home from the shop. Keep away from doors, heat vents, and fireplaces, and maintain steady warmth above 13C (55F).
Why is my poinsettia overwatering and root rot?
The most frequent cause of yellowing, wilting, and collapse. Let the soil surface dry between waterings, ensure free drainage, and never leave the pot standing in water or a foil sleeve.
Why is my poinsettia whitefly infestation?
Tiny white sap-sucking insects cluster under leaves, causing yellowing and drop. Treat early with insecticidal soap, neem, or horticultural oil and inspect new plants before bringing them home.
Why is my poinsettia bracts won't recolour?
To rebloom, the plant needs about 14-16 hours of complete uninterrupted darkness each night starting in late September or October, plus bright light by day. Any stray light at night disrupts colour development.
Why is my poinsettia scorched or faded bracts?
Harsh direct midday sun or sudden temperature change can bleach and crisp the colourful bracts. Provide bright but filtered light and stable conditions.
Why is my poinsettia botrytis (grey mould)?
Stagnant, overly humid air and water sitting on leaves and bracts encourage grey fuzzy mould. Improve airflow, avoid misting the bracts, and remove affected tissue promptly.