Veronica cinerea · Perennial
Powdery mildew: Improve air circulation and apply a suitable fungicide if infection is severe.
Slugs and snails: Use physical barriers, iron phosphate baits, or hand-pick at night to control populations.
Root rot: Ensure well-draining soil and avoid overwatering; remove severely affected plants.
Aphids: Spray off with water or apply insecticidal soap; encourage natural predators like ladybirds.
Vine weevil: Apply systemic insecticide drenches or use nematode treatments in early autumn.