Troubleshooting
Profusion White Zinnia problems — and how to fix them
Profusion White Zinnia (Zinnia x hybrida) 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.
Powdery mildew
Improve air circulation and avoid overhead watering; the Profusion series has improved resistance but is not immune in humid conditions.
Alternaria leaf blight
Brown spots with yellow halos appear in wet weather; remove affected leaves and apply a copper-based fungicide if severe.
Spider mites
Fine webbing on undersides of leaves in hot, dry spells; knock off with a strong jet of water or apply insecticidal soap.
Bacterial leaf spot
Water-soaked lesions that turn brown; avoid wetting leaves and rotate planting locations each year.
Aphids
Clusters on new growth distort stems; treat with insecticidal soap or neem oil spray.
Prevent profusion white zinnia problems before they start
Most profusion white zinnia issues are care-mismatch, not bad luck. Dial in the basics:
Profusion White Zinnia problems — FAQ
Why is my profusion white zinnia powdery mildew?
Improve air circulation and avoid overhead watering; the Profusion series has improved resistance but is not immune in humid conditions.
Why is my profusion white zinnia alternaria leaf blight?
Brown spots with yellow halos appear in wet weather; remove affected leaves and apply a copper-based fungicide if severe.
Why is my profusion white zinnia spider mites?
Fine webbing on undersides of leaves in hot, dry spells; knock off with a strong jet of water or apply insecticidal soap.
Why is my profusion white zinnia bacterial leaf spot?
Water-soaked lesions that turn brown; avoid wetting leaves and rotate planting locations each year.
Why is my profusion white zinnia aphids?
Clusters on new growth distort stems; treat with insecticidal soap or neem oil spray.