Troubleshooting
Heuchera 'Rave On' problems — and how to fix them
Heuchera 'Rave On' (Heuchera 'Rave On') 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 primary failure mode for Heuchera; free-draining soil and correct planting depth are essential, especially for this vigorous cultivar.
Vine weevil
Root-feeding larvae are the most damaging pest; apply nematodes to the soil in late summer as a preventive biological control.
Powdery mildew
White powdery coating on the large leaf surfaces in warm, dry, still conditions; improve spacing and treat with a potassium bicarbonate spray.
Crown heaving
The vigorous, large-crowned habit can be prone to frost-heave in cold gardens; mulch around the base in autumn and firm down after winter thaw events.
Slugs and snails
Large lime-green leaves are attractive targets; apply grit barriers or wildlife-safe pellets in spring when new foliage emerges.
Prevent heuchera 'rave on' problems before they start
Most heuchera 'rave on' issues are care-mismatch, not bad luck. Dial in the basics:
Heuchera 'Rave On' problems — FAQ
Why is my heuchera 'rave on' crown rot?
The primary failure mode for Heuchera; free-draining soil and correct planting depth are essential, especially for this vigorous cultivar.
Why is my heuchera 'rave on' vine weevil?
Root-feeding larvae are the most damaging pest; apply nematodes to the soil in late summer as a preventive biological control.
Why is my heuchera 'rave on' powdery mildew?
White powdery coating on the large leaf surfaces in warm, dry, still conditions; improve spacing and treat with a potassium bicarbonate spray.
Why is my heuchera 'rave on' crown heaving?
The vigorous, large-crowned habit can be prone to frost-heave in cold gardens; mulch around the base in autumn and firm down after winter thaw events.
Why is my heuchera 'rave on' slugs and snails?
Large lime-green leaves are attractive targets; apply grit barriers or wildlife-safe pellets in spring when new foliage emerges.