Iris japonica · Perennial
Slugs and snails: Use beer traps, copper tape barriers, or hand-pick at night to reduce populations.
Grey mould (Botrytis): Improve air circulation and remove dead or decaying plant material promptly.
Bacterial soft rot: Ensure well-drained soil and discard infected rhizomes immediately to prevent spread.
Thrips: Monitor regularly and use blue sticky traps or insecticidal soap for severe infestations.
Aphid-borne viruses: Control aphids early in the season and remove severely infected plants to prevent spread.