Iris laevigata · Perennial
Slugs and snails: Use physical barriers like copper tape or hand-pick at night; avoid chemical slug pellets where possible.
Iris sawfly: Inspect plants regularly in spring and remove infested leaves or apply biological controls like nematodes.
Bacterial soft rot: Ensure excellent drainage and air circulation; remove and destroy affected plants immediately to prevent spread.
Grey mould (Botrytis): Improve air circulation around plants and remove dead or decaying flower heads promptly.
Iris leaf spot: Remove infected leaves and clear away all leaf debris at the end of the growing season to reduce overwintering spores.