Potato Late Blight: Dark Spots, Sudden Wilt
Leaves problem · common pattern reported by gardeners · verify locally
What you'll see
- Dark water-soaked spots on leaves
- White fuzz on leaf undersides in wet weather
- Rapid plant collapse
Most common causes
- Late blight fungus (Phytophthora)
- Cool wet weather
- Infected tubers or volunteers
How to fix it
- Remove and bag infected plants immediately
- Don't compost infected material
- Harvest remaining tubers and dry well
Prevention: Resistant varieties Avoid overhead watering Destroy volunteer potatoes
More Potato problems
Grow Potato with confidence
Open the Potato growing guide → · Planting calendar · Pest & problem diagnoser
ZoneFig content reflects widely published extension-service and gardening guidance. Symptoms and causes are common patterns, not a diagnosis for any individual plant — verify locally and treat conservatively.