Troubleshooting
Gerbera Daisy problems — and how to fix them
Gerbera Daisy (Gerbera jamesonii) 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.
Crown and root rot
The most common and serious problem, caused by soggy soil and water-mould pathogens (Phytophthora, Pythium). Plant with the crown above soil level, water at the base, and ensure sharp drainage.
Powdery mildew
White powdery coating on leaves and stems, favoured by warm days, cool nights, high humidity, and poor airflow. Improve ventilation, avoid wetting foliage, and treat with a suitable fungicide or horticultural oil.
Botrytis (grey mould)
Fuzzy grey mould on flowers and foliage in damp, still air. Remove faded blooms and dead leaves promptly and increase air circulation, particularly on plants grown under cover.
Sap-sucking pests
Aphids, whitefly, thrips, and spider mites cluster on new growth and undersides of leaves. Treat with insecticidal soap or neem oil and check regularly, especially indoors and under glass.
Few flowers / leggy growth
Usually too little light. Move to a brighter spot, deadhead spent blooms to encourage more, and feed during the growing season.
Yellowing between leaf veins
Interveinal chlorosis from iron/manganese deficiency, common in pots. Use a fertiliser containing micronutrients and check that the soil is not waterlogged or too alkaline.
Prevent gerbera daisy problems before they start
Most gerbera daisy issues are care-mismatch, not bad luck. Dial in the basics:
Gerbera Daisy problems — FAQ
Why is my gerbera daisy crown and root rot?
The most common and serious problem, caused by soggy soil and water-mould pathogens (Phytophthora, Pythium). Plant with the crown above soil level, water at the base, and ensure sharp drainage.
Why is my gerbera daisy powdery mildew?
White powdery coating on leaves and stems, favoured by warm days, cool nights, high humidity, and poor airflow. Improve ventilation, avoid wetting foliage, and treat with a suitable fungicide or horticultural oil.
Why is my gerbera daisy botrytis (grey mould)?
Fuzzy grey mould on flowers and foliage in damp, still air. Remove faded blooms and dead leaves promptly and increase air circulation, particularly on plants grown under cover.
Why is my gerbera daisy sap-sucking pests?
Aphids, whitefly, thrips, and spider mites cluster on new growth and undersides of leaves. Treat with insecticidal soap or neem oil and check regularly, especially indoors and under glass.
Why is my gerbera daisy few flowers / leggy growth?
Usually too little light. Move to a brighter spot, deadhead spent blooms to encourage more, and feed during the growing season.
Why is my gerbera daisy yellowing between leaf veins?
Interveinal chlorosis from iron/manganese deficiency, common in pots. Use a fertiliser containing micronutrients and check that the soil is not waterlogged or too alkaline.