Troubleshooting
London Pride problems — and how to fix them
London Pride (Saxifraga urbium) 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 grub damage
Creamy-white grubs feed on roots through winter, causing plants to suddenly wilt and collapse. Apply nematode biological controls (Steinernema kraussei) to moist soil in autumn when soil temperature is above 5°C.
Botrytis (grey mould)
Poor air circulation in dense plantings encourages grey mould on rosettes, especially in damp winters. Thin plantings, remove dead leaves promptly, and avoid overhead watering.
Aphid infestation on flower stems
Colonies of greenfly gather on emerging flower stems in spring. Squash by hand, blast with water, or apply insecticidal soap. Usually temporary and does not threaten plant health.
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 grub damage?
Creamy-white grubs feed on roots through winter, causing plants to suddenly wilt and collapse. Apply nematode biological controls (Steinernema kraussei) to moist soil in autumn when soil temperature is above 5°C.
Why is my london pride botrytis (grey mould)?
Poor air circulation in dense plantings encourages grey mould on rosettes, especially in damp winters. Thin plantings, remove dead leaves promptly, and avoid overhead watering.
Why is my london pride aphid infestation on flower stems?
Colonies of greenfly gather on emerging flower stems in spring. Squash by hand, blast with water, or apply insecticidal soap. Usually temporary and does not threaten plant health.