Calluna vulgaris · Shrub
Honey fungus (Armillaria): Remove infected plants completely and avoid replanting ericaceous species in that spot for several years.
Root rot (Phytophthora): Ensure excellent drainage by planting in sandy, acidic soil and avoid overwatering.
Powdery mildew: Improve air circulation by thinning dense growth and apply a suitable fungicide if severe.
Vine weevil: Apply nematodes to the soil in autumn or use a systemic insecticide for potted plants.
Slugs and snails: Use slug pellets, beer traps, or hand-pick pests at night to protect new growth.