Troubleshooting
Heuchera 'Tiramisu' problems — and how to fix them
Heuchera 'Tiramisu' (Heuchera 'Tiramisu') 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
The most common killer; plant at the correct depth with excellent drainage and never let water pool around the crown.
Colour fade
The creamy-yellow zones can bleach in high light; move to a shadier position if fading becomes apparent.
Vine weevil
Larvae attack roots in late summer; apply nematode controls proactively in August-September.
Slugs
Young growth is particularly vulnerable; use organic slug pellets or sharp grit as a collar around the base.
Mildew
Powdery white mildew in humid, airless conditions; improve spacing and avoid evening watering.
Prevent heuchera 'tiramisu' problems before they start
Most heuchera 'tiramisu' issues are care-mismatch, not bad luck. Dial in the basics:
Heuchera 'Tiramisu' problems — FAQ
Why is my heuchera 'tiramisu' crown rot?
The most common killer; plant at the correct depth with excellent drainage and never let water pool around the crown.
Why is my heuchera 'tiramisu' colour fade?
The creamy-yellow zones can bleach in high light; move to a shadier position if fading becomes apparent.
Why is my heuchera 'tiramisu' vine weevil?
Larvae attack roots in late summer; apply nematode controls proactively in August-September.
Why is my heuchera 'tiramisu' slugs?
Young growth is particularly vulnerable; use organic slug pellets or sharp grit as a collar around the base.
Why is my heuchera 'tiramisu' mildew?
Powdery white mildew in humid, airless conditions; improve spacing and avoid evening watering.