Troubleshooting
Rutabaga 'American Purple Top' problems — and how to fix them
Rutabaga 'American Purple Top' (Brassica napus var. napobrassica 'American Purple Top') 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.
Clubroot
Brassica root disease producing galled, swollen roots and stunted plants. Practise 3-4 year rotation, improve drainage, and lime toward neutral pH to reduce infection.
Brown-heart
Internal flesh browning from boron deficiency, common on dry or over-limed ground. Keep moisture even and correct boron with trace-element feed or compost.
Cabbage root fly and flea beetle
Maggots tunnel roots and flea beetles shot-hole the leaves. Protect with insect mesh from sowing and fit basal collars against root fly.
Cracked or woody roots
Result from irregular watering, heat, or over-maturity. Maintain steady moisture, grow in the cool season, and harvest at moderate size after frost.
Prevent rutabaga 'american purple top' problems before they start
Most rutabaga 'american purple top' issues are care-mismatch, not bad luck. Dial in the basics:
- What's wrong with my plant? — the diagnosis apps compared
- Rutabaga 'American Purple Top' watering schedule
- Rutabaga 'American Purple Top' light requirements
- Best soil mix for rutabaga 'american purple top'
- Rutabaga 'American Purple Top' temperature & humidity
- Full rutabaga 'american purple top' care guide
Looking for rutabaga 'american purple top' in general rather than its problems? Read the full rutabaga 'american purple top' care guide — light, water, soil and feeding.
Rutabaga 'American Purple Top' problems — FAQ
Why is my rutabaga 'american purple top' clubroot?
Brassica root disease producing galled, swollen roots and stunted plants. Practise 3-4 year rotation, improve drainage, and lime toward neutral pH to reduce infection.
Why is my rutabaga 'american purple top' brown-heart?
Internal flesh browning from boron deficiency, common on dry or over-limed ground. Keep moisture even and correct boron with trace-element feed or compost.
Why is my rutabaga 'american purple top' cabbage root fly and flea beetle?
Maggots tunnel roots and flea beetles shot-hole the leaves. Protect with insect mesh from sowing and fit basal collars against root fly.
Why is my rutabaga 'american purple top' cracked or woody roots?
Result from irregular watering, heat, or over-maturity. Maintain steady moisture, grow in the cool season, and harvest at moderate size after frost.