Troubleshooting
All Blue Potato problems — and how to fix them
All Blue Potato (Solanum tuberosum 'All Blue') 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.
Late blight
Fungal-like Phytophthora infestans browns leaves and rots tubers in cool, wet spells. Space for airflow, avoid overhead watering, and remove infected haulm.
Greening of tubers
Tubers exposed to light turn green and accumulate toxic solanine. Hill soil over developing tubers and store the harvest in the dark.
Common scab
Corky lesions on skin, worse in alkaline, dry soil. Keep pH below 6.0, maintain even moisture, and avoid fresh lime or manure.
Colorado potato beetle
Striped beetles and red larvae can strip foliage. Hand-pick, crush egg clusters on leaf undersides, and rotate crops yearly.
Prevent all blue potato problems before they start
Most all blue potato issues are care-mismatch, not bad luck. Dial in the basics:
Looking for all blue potato in general rather than its problems? Read the full all blue potato care guide — light, water, soil and feeding.
All Blue Potato problems — FAQ
Why is my all blue potato late blight?
Fungal-like Phytophthora infestans browns leaves and rots tubers in cool, wet spells. Space for airflow, avoid overhead watering, and remove infected haulm.
Why is my all blue potato greening of tubers?
Tubers exposed to light turn green and accumulate toxic solanine. Hill soil over developing tubers and store the harvest in the dark.
Why is my all blue potato common scab?
Corky lesions on skin, worse in alkaline, dry soil. Keep pH below 6.0, maintain even moisture, and avoid fresh lime or manure.
Why is my all blue potato colorado potato beetle?
Striped beetles and red larvae can strip foliage. Hand-pick, crush egg clusters on leaf undersides, and rotate crops yearly.