Pest identification
What's eating my fire alarm heuchera?
Vine weevil
Signs: Adults create notched leaf margins; larvae consume roots until the crown detaches and plant dies
Control: Apply Steinernema kraussei nematodes to moist soil in late August; inspect and replace dead-crowned plants
Aphids
Signs: Clusters of green or black aphids on flower scapes and tender new growth in spring
Control: Blast with water; use insecticidal soap spray; foster natural predators like lacewings and ladybirds
Slugs
Signs: Holes and ragged edges on lower leaves during wet periods, particularly in spring
Control: Use iron phosphate pellets; keep crown area clear of mulch contact; hand-pick at night
Keep fire alarm heuchera pest-free
Healthy plants resist pests best. Get the basics right:
Fire Alarm Heuchera pests — FAQ
What is eating my fire alarm heuchera?
Fire Alarm Heuchera's vivid red foliage is primarily threatened by vine weevil larvae, which destroy roots and cause sudden plant death. Adults notch leaf margins. Aphids feed on flower stems in spring. Root nematode drenches in late summer, combined with aphid control when needed, keep this heuchera performing well.
How do I get rid of vine weevil on fire alarm heuchera?
Adults create notched leaf margins; larvae consume roots until the crown detaches and plant dies Apply Steinernema kraussei nematodes to moist soil in late August; inspect and replace dead-crowned plants
How do I get rid of aphids on fire alarm heuchera?
Clusters of green or black aphids on flower scapes and tender new growth in spring Blast with water; use insecticidal soap spray; foster natural predators like lacewings and ladybirds
How do I get rid of slugs on fire alarm heuchera?
Holes and ragged edges on lower leaves during wet periods, particularly in spring Use iron phosphate pellets; keep crown area clear of mulch contact; hand-pick at night