Troubleshooting
Rutabaga 'Laurentian' problems — and how to fix them
Rutabaga 'Laurentian' (Brassica napus var. napobrassica 'Laurentian') 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
Soil-borne brassica disease causing swollen, distorted roots and wilting. Rotate brassicas on a 3-4 year cycle, improve drainage, and raise soil pH toward neutral to suppress it.
Brown-heart (boron deficiency)
Browning of the internal flesh from low boron, worse on dry or over-limed soils. Maintain organic matter and apply a boron trace element where deficiency is known.
Flea beetle and cabbage root fly
Beetles pit the leaves and root-fly maggots tunnel the roots. Cover with insect mesh from sowing and use brassica collars at the base of plants.
Woody, bitter roots
Caused by heat, drought, or harvesting too late and large. Keep moisture even, grow as a cool-season crop, and lift at moderate size after frost for the sweetest flesh.
Prevent rutabaga 'laurentian' problems before they start
Most rutabaga 'laurentian' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for rutabaga 'laurentian' in general rather than its problems? Read the full rutabaga 'laurentian' care guide — light, water, soil and feeding.
Rutabaga 'Laurentian' problems — FAQ
Why is my rutabaga 'laurentian' clubroot?
Soil-borne brassica disease causing swollen, distorted roots and wilting. Rotate brassicas on a 3-4 year cycle, improve drainage, and raise soil pH toward neutral to suppress it.
Why is my rutabaga 'laurentian' brown-heart (boron deficiency)?
Browning of the internal flesh from low boron, worse on dry or over-limed soils. Maintain organic matter and apply a boron trace element where deficiency is known.
Why is my rutabaga 'laurentian' flea beetle and cabbage root fly?
Beetles pit the leaves and root-fly maggots tunnel the roots. Cover with insect mesh from sowing and use brassica collars at the base of plants.
Why is my rutabaga 'laurentian' woody, bitter roots?
Caused by heat, drought, or harvesting too late and large. Keep moisture even, grow as a cool-season crop, and lift at moderate size after frost for the sweetest flesh.