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Rust in Larkspur

How to identify and treat rust in Larkspur.

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Larkspur care requirements

water
Keep soil evenly moist during growing season; reduce water once established
soil
Well-draining, moderately fertile soil with pH 6.0–7.0
light
Full sun to light shade; prefers 6+ hours of sunlight daily
symptoms

Symptoms to look for in Larkspur

  • fiber_manual_recordOrange or brown pustules on leaf undersides
  • fiber_manual_recordYellow spots on leaf tops
  • fiber_manual_recordPremature leaf drop
help

Common causes in Larkspur

Caused by various Puccinia and Phragmidium species. Spreads via windborne spores in moist conditions.

healing

How to treat rust in Larkspur

Remove and destroy infected leaves. Apply copper or sulphur fungicide.

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Preventing rust in Larkspur

Avoid overhead watering. Space plants adequately. Clear debris.