Troubleshooting
Choy Sum 'Green Lance' problems — and how to fix them
Choy Sum 'Green Lance' (Brassica rapa var. parachinensis 'Green Lance') 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.
Premature bolting
Heat, transplant shock, or stress makes plants flower and run to seed too fast. Sow at the right season, keep moist, and harvest stems promptly.
Flea beetles
Shot-hole damage on seedling leaves slows establishment. Protect with fine mesh and grow young plants on quickly.
Aphids
Cluster on tender stem tips and buds, fouling them. Blast off with water, encourage ladybirds, or use insecticidal soap.
Clubroot
Distorted, swollen roots and wilting in infected brassica soils. Rotate crops, lime to near-neutral pH, and improve drainage.
Prevent choy sum 'green lance' problems before they start
Most choy sum 'green lance' issues are care-mismatch, not bad luck. Dial in the basics:
- Common turnip problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Choy Sum 'Green Lance' watering schedule
- Choy Sum 'Green Lance' light requirements
- Best soil mix for choy sum 'green lance'
- Choy Sum 'Green Lance' temperature & humidity
- Full choy sum 'green lance' care guide
Looking for choy sum 'green lance' in general rather than its problems? Read the full choy sum 'green lance' care guide — light, water, soil and feeding.
Choy Sum 'Green Lance' problems — FAQ
Why is my choy sum 'green lance' premature bolting?
Heat, transplant shock, or stress makes plants flower and run to seed too fast. Sow at the right season, keep moist, and harvest stems promptly.
Why is my choy sum 'green lance' flea beetles?
Shot-hole damage on seedling leaves slows establishment. Protect with fine mesh and grow young plants on quickly.
Why is my choy sum 'green lance' aphids?
Cluster on tender stem tips and buds, fouling them. Blast off with water, encourage ladybirds, or use insecticidal soap.
Why is my choy sum 'green lance' clubroot?
Distorted, swollen roots and wilting in infected brassica soils. Rotate crops, lime to near-neutral pH, and improve drainage.