Troubleshooting
Lupinus polyphyllus 'Gallery Blue' problems — and how to fix them
Lupinus polyphyllus 'Gallery Blue' (Lupinus polyphyllus 'Gallery 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.
Lupin aphid
Large grey aphids colonise the spikes. Inspect frequently and rinse off or treat promptly; heavy infestation deforms flowers and saps the plant.
Powdery mildew
Greyish coating on leaves in dry, crowded conditions after flowering. Cut back spent spikes, water at soil level, and keep plants spaced for airflow.
Crown rot
Wet, poorly drained soil rots the crown, especially over winter. Plant in free-draining ground or gritty container mix and avoid standing water.
Chlorosis on alkaline soil
Yellowing between veins shows lime-induced iron lock-out. Provide neutral-to-acid soil; this cultivar struggles on chalk.
Prevent lupinus polyphyllus 'gallery blue' problems before they start
Most lupinus polyphyllus 'gallery blue' issues are care-mismatch, not bad luck. Dial in the basics:
- Common lupine problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Lupinus polyphyllus 'Gallery Blue' watering schedule
- Lupinus polyphyllus 'Gallery Blue' light requirements
- Best soil mix for lupinus polyphyllus 'gallery blue'
- Lupinus polyphyllus 'Gallery Blue' temperature & humidity
- Full lupinus polyphyllus 'gallery blue' care guide
Looking for lupinus polyphyllus 'gallery blue' in general rather than its problems? Read the full lupinus polyphyllus 'gallery blue' care guide — light, water, soil and feeding.
Lupinus polyphyllus 'Gallery Blue' problems — FAQ
Why is my lupinus polyphyllus 'gallery blue' lupin aphid?
Large grey aphids colonise the spikes. Inspect frequently and rinse off or treat promptly; heavy infestation deforms flowers and saps the plant.
Why is my lupinus polyphyllus 'gallery blue' powdery mildew?
Greyish coating on leaves in dry, crowded conditions after flowering. Cut back spent spikes, water at soil level, and keep plants spaced for airflow.
Why is my lupinus polyphyllus 'gallery blue' crown rot?
Wet, poorly drained soil rots the crown, especially over winter. Plant in free-draining ground or gritty container mix and avoid standing water.
Why is my lupinus polyphyllus 'gallery blue' chlorosis on alkaline soil?
Yellowing between veins shows lime-induced iron lock-out. Provide neutral-to-acid soil; this cultivar struggles on chalk.