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Downy Mildew in Hardy Geranium

How to identify and treat downy mildew in Hardy Geranium.

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Hardy Geranium care requirements

water
Regular until established. Drought tolerant once established.
soil
Average, well-draining soil.
light
Full sun to partial shade.
symptoms

Symptoms to look for in Hardy Geranium

  • fiber_manual_recordYellow patches on upper leaf surface
  • fiber_manual_recordGrey-purple fuzzy growth on undersides
  • fiber_manual_recordWilting
help

Common causes in Hardy Geranium

Caused by Peronospora and Pseudoperonospora species. Spreads in cool, humid conditions.

healing

How to treat downy mildew in Hardy Geranium

Remove affected material. Apply copper fungicide or phosphonate.

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Preventing downy mildew in Hardy Geranium

Avoid overcrowding. Water in morning. Choose resistant varieties.