Troubleshooting
Heuchera 'Quicksilver' problems — and how to fix them
Heuchera 'Quicksilver' (Heuchera 'Quicksilver') 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
Poor drainage at the crown quickly leads to lethal rot; always plant in free-draining soil with the crown sitting at or just above ground level.
Vine weevil
Adult notching of leaf margins and larval root destruction are the most serious pest threats; apply soil-applied nematodes in late summer.
Powdery mildew
White powdery growth on leaf surfaces in warm, dry, poorly ventilated conditions; improve airflow and spray with diluted potassium bicarbonate.
Leaf scorch
Direct midday summer sun bleaches the silver tones and creates brown patches; relocate or provide afternoon shading.
Slugs
Tender young foliage emerging in spring is a target for slug feeding; apply grit barriers or nematode slug treatments at the start of the growing season.
Prevent heuchera 'quicksilver' problems before they start
Most heuchera 'quicksilver' issues are care-mismatch, not bad luck. Dial in the basics:
Heuchera 'Quicksilver' problems — FAQ
Why is my heuchera 'quicksilver' crown rot?
Poor drainage at the crown quickly leads to lethal rot; always plant in free-draining soil with the crown sitting at or just above ground level.
Why is my heuchera 'quicksilver' vine weevil?
Adult notching of leaf margins and larval root destruction are the most serious pest threats; apply soil-applied nematodes in late summer.
Why is my heuchera 'quicksilver' powdery mildew?
White powdery growth on leaf surfaces in warm, dry, poorly ventilated conditions; improve airflow and spray with diluted potassium bicarbonate.
Why is my heuchera 'quicksilver' leaf scorch?
Direct midday summer sun bleaches the silver tones and creates brown patches; relocate or provide afternoon shading.
Why is my heuchera 'quicksilver' slugs?
Tender young foliage emerging in spring is a target for slug feeding; apply grit barriers or nematode slug treatments at the start of the growing season.