Troubleshooting
Lupinus 'Manhattan Lights' problems — and how to fix them
Lupinus 'Manhattan Lights' (Lupinus 'Manhattan Lights') 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 cluster on spikes and weaken the plant. Spot them early and wash off or treat; severe infestations cause spikes to wilt and collapse.
Powdery mildew
Foliage greys and curls in dry, crowded sites after bloom. Deadhead, water at the base, and space plants for ventilation.
Crown rot in wet ground
Heavy, waterlogged soils rot the crown over winter. Use free-draining soil and avoid sites prone to standing water.
Lime-induced chlorosis
Yellow leaves with green veins indicate alkaline soil. Lupins need neutral-to-acid conditions; acidify chalky ground or use raised free-draining beds.
Prevent lupinus 'manhattan lights' problems before they start
Most lupinus 'manhattan lights' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for lupinus 'manhattan lights' in general rather than its problems? Read the full lupinus 'manhattan lights' care guide — light, water, soil and feeding.
Lupinus 'Manhattan Lights' problems — FAQ
Why is my lupinus 'manhattan lights' lupin aphid?
Large grey aphids cluster on spikes and weaken the plant. Spot them early and wash off or treat; severe infestations cause spikes to wilt and collapse.
Why is my lupinus 'manhattan lights' powdery mildew?
Foliage greys and curls in dry, crowded sites after bloom. Deadhead, water at the base, and space plants for ventilation.
Why is my lupinus 'manhattan lights' crown rot in wet ground?
Heavy, waterlogged soils rot the crown over winter. Use free-draining soil and avoid sites prone to standing water.
Why is my lupinus 'manhattan lights' lime-induced chlorosis?
Yellow leaves with green veins indicate alkaline soil. Lupins need neutral-to-acid conditions; acidify chalky ground or use raised free-draining beds.