What's eating my heucherella stoplight?

Heucherella 'Stoplight' faces its biggest threat from black vine weevil, whose grubs silently devour roots until the plant wilts. Adults notch leaf margins at night. Foliar nematodes and aphids can also attack. Slugs occasionally shelter beneath the foliage but rarely eat it.

Adults cut distinctive notches around leaf margins at night; C-shaped grubs eat roots underground, causing sudden wilting and plant collapse Apply parasitic nematodes (Steinernema kraussei or Heterorhabditis megidis) to moist soil in late summer; use sticky barrier tape around pots; hand-pick adults after dark with a torch

Angular brown or tan patches between leaf veins that expand after rain; severe infestations can kill the plant Remove and destroy affected leaves promptly; water at soil level only; improve air circulation; avoid overhead irrigation

Clusters of small soft insects on new growth cause distorted, sticky leaves and can transmit viruses Blast off with a strong jet of water; spray with insecticidal soap or neem oil; encourage natural predators such as ladybugs and lacewings