Troubleshooting
Whitley's Speedwell problems — and how to fix them
Whitley's Speedwell (Veronica whitleyi) 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
Caused by excess winter moisture around the crown. Improve drainage by top-dressing with grit and ensuring the planting site does not sit in standing water.
Powdery mildew
Can appear in humid, poorly ventilated conditions. Improve air circulation; avoid overhead watering. Treat with a dilute potassium bicarbonate spray if severe.
Sparse flowering
Usually caused by insufficient sun or excessive nitrogen fertiliser. Move to a sunnier position and switch to a low-nitrogen feed.
Prevent whitley's speedwell problems before they start
Most whitley's speedwell issues are care-mismatch, not bad luck. Dial in the basics:
Whitley's Speedwell problems — FAQ
Why is my whitley's speedwell crown rot?
Caused by excess winter moisture around the crown. Improve drainage by top-dressing with grit and ensuring the planting site does not sit in standing water.
Why is my whitley's speedwell powdery mildew?
Can appear in humid, poorly ventilated conditions. Improve air circulation; avoid overhead watering. Treat with a dilute potassium bicarbonate spray if severe.
Why is my whitley's speedwell sparse flowering?
Usually caused by insufficient sun or excessive nitrogen fertiliser. Move to a sunnier position and switch to a low-nitrogen feed.