Mentha arvensis · Perennial
Mint rust: Improve air circulation and remove affected foliage; avoid wetting leaves when watering.
Slugs and snails: Use beer traps, copper tape barriers, or iron phosphate-based pellets to control populations.
Powdery mildew: Ensure good air circulation and water at the base; apply a fungicide if severe.
Vine weevil: Check roots before planting and use nematode treatments or biological controls in soil.
Aphids: Spray off with water or apply insecticidal soap; encourage natural predators like ladybirds.