Troubleshooting
Woolly Foxglove problems — and how to fix them
Woolly Foxglove (Digitalis lanata) 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.
Crown rot in wet winters
The basal rosette is susceptible to rotting in waterlogged soil over winter. Improve drainage before planting; avoid heavy mulching over the crown. In containers, ensure drainage holes are clear.
Aphid infestations
Foxglove aphids (Aulacorthum solani) colonise flower spikes and new growth. Treat with insecticidal soap or a strong water jet; encourage hoverflies and ladybirds as natural predators.
Powdery mildew
White powdery coating on leaves in dry, warm conditions with poor airflow. Improve spacing and ventilation; apply a potassium bicarbonate spray as a low-impact treatment.
Prevent woolly foxglove problems before they start
Most woolly foxglove issues are care-mismatch, not bad luck. Dial in the basics:
Woolly Foxglove problems — FAQ
Why is my woolly foxglove crown rot in wet winters?
The basal rosette is susceptible to rotting in waterlogged soil over winter. Improve drainage before planting; avoid heavy mulching over the crown. In containers, ensure drainage holes are clear.
Why is my woolly foxglove aphid infestations?
Foxglove aphids (Aulacorthum solani) colonise flower spikes and new growth. Treat with insecticidal soap or a strong water jet; encourage hoverflies and ladybirds as natural predators.
Why is my woolly foxglove powdery mildew?
White powdery coating on leaves in dry, warm conditions with poor airflow. Improve spacing and ventilation; apply a potassium bicarbonate spray as a low-impact treatment.