Troubleshooting
Coral Bells 'Caramel' problems — and how to fix them
Coral Bells 'Caramel' (Heuchera villosa) 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
Despite being more robust than other Heuchera, excessive soil moisture at the crown still causes rot; ensure free drainage.
Vine weevil
Root-feeding larvae cause sudden collapse; apply nematode biocontrols in late summer.
Rust
Orange pustules on leaf undersides in humid conditions; remove affected leaves and apply a sulphur-based fungicide.
Slugs
Young foliage is attractive to slugs, particularly in spring; use slug controls around new growth.
Frost heaving
Even in hardiness range, severe freeze-thaw can push crowns up; replant and mulch around the crown before hard frosts.
Prevent coral bells 'caramel' problems before they start
Most coral bells 'caramel' issues are care-mismatch, not bad luck. Dial in the basics:
Coral Bells 'Caramel' problems — FAQ
Why is my coral bells 'caramel' crown rot?
Despite being more robust than other Heuchera, excessive soil moisture at the crown still causes rot; ensure free drainage.
Why is my coral bells 'caramel' vine weevil?
Root-feeding larvae cause sudden collapse; apply nematode biocontrols in late summer.
Why is my coral bells 'caramel' rust?
Orange pustules on leaf undersides in humid conditions; remove affected leaves and apply a sulphur-based fungicide.
Why is my coral bells 'caramel' slugs?
Young foliage is attractive to slugs, particularly in spring; use slug controls around new growth.
Why is my coral bells 'caramel' frost heaving?
Even in hardiness range, severe freeze-thaw can push crowns up; replant and mulch around the crown before hard frosts.