Troubleshooting
Rock Speedwell problems — and how to fix them
Rock Speedwell (Veronica fruticans) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Powdery mildew
Grey-white coating on leaves in warm, humid, poorly ventilated conditions. Improve air circulation, avoid overhead watering, and treat with a sulphur-based fungicide if severe.
Root rot from winter wet
The most common cause of plant death. Ensure sharp drainage and, in persistently wet climates, grow in a raised trough or alpine house to protect crowns from standing water.
Prevent rock speedwell problems before they start
Most rock speedwell issues are care-mismatch, not bad luck. Dial in the basics:
Rock Speedwell problems — FAQ
Why is my rock speedwell powdery mildew?
Grey-white coating on leaves in warm, humid, poorly ventilated conditions. Improve air circulation, avoid overhead watering, and treat with a sulphur-based fungicide if severe.
Why is my rock speedwell root rot from winter wet?
The most common cause of plant death. Ensure sharp drainage and, in persistently wet climates, grow in a raised trough or alpine house to protect crowns from standing water.