Euphorbia cornigera · Perennial
Aphids: Squash by hand or spray with a plant-based insecticide like rosehip seed oil.
Grey mould (Botrytis): Improve air circulation and remove affected plant parts to prevent spread.
Root rot: Ensure soil is moist but well-drained and avoid overwatering, especially in winter.
Powdery mildew: Apply a fungicide or milk spray and ensure good air circulation around the plant.
Slugs and snails: Use beer traps, copper tape barriers, or iron phosphate-based pellets.