Troubleshooting
London Pride problems — and how to fix them
London Pride (Saxifraga umbrosa) 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.
Vine weevil
Larvae feed on roots, causing sudden wilting and plant collapse. Check compost for creamy grubs; treat with nematodes (Steinernema kraussei) in autumn or spring when soil is moist and above 5 °C.
Powdery mildew
Can occur in hot, dry conditions with poor air circulation. Improve airflow, avoid overhead watering, and remove affected leaves. Severe cases can be treated with a potassium bicarbonate-based spray.
Crown rot
Caused by waterlogged soil, particularly over winter. Ensure free drainage; avoid planting crowns below soil level. Gritty soil and raised beds reduce the risk significantly.
Prevent london pride problems before they start
Most london pride issues are care-mismatch, not bad luck. Dial in the basics:
London Pride problems — FAQ
Why is my london pride vine weevil?
Larvae feed on roots, causing sudden wilting and plant collapse. Check compost for creamy grubs; treat with nematodes (Steinernema kraussei) in autumn or spring when soil is moist and above 5 °C.
Why is my london pride powdery mildew?
Can occur in hot, dry conditions with poor air circulation. Improve airflow, avoid overhead watering, and remove affected leaves. Severe cases can be treated with a potassium bicarbonate-based spray.
Why is my london pride crown rot?
Caused by waterlogged soil, particularly over winter. Ensure free drainage; avoid planting crowns below soil level. Gritty soil and raised beds reduce the risk significantly.