Primula veris · Perennial
Primula rust (Puccinia primulae): Remove and destroy infected leaves immediately; avoid fungicides to protect biodiversity.
Slugs and snails: Use physical barriers like copper tape or beer traps, and hand-pick at night.
Powdery mildew: Improve air circulation around plants and avoid overhead watering to keep foliage dry.
Vine weevil: Check pots for grubs before planting and use nematode treatments in late summer.
Root rot: Ensure well-drained soil and avoid overwatering, especially in winter.