Troubleshooting
Iris 'Clarence' problems — and how to fix them
Iris 'Clarence' (Iris 'Clarence') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Bacterial soft rot
Buried or overwatered rhizomes turn slimy and foul. Plant shallowly in free-draining soil and cut out rotted tissue immediately.
Poor rebloom
Shade, cold, crowding or under-feeding suppress the autumn flush. Provide full sun, summer feeding and regular division to encourage it.
Iris leaf spot
Damp weather brings fungal brown spots; remove affected foliage and clear autumn debris to limit spread.
Iris borer
Larvae tunnel rhizomes and invite rot, chiefly in North America. Remove dead foliage in autumn and destroy infested rhizomes.
Prevent iris 'clarence' problems before they start
Most iris 'clarence' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for the species overview? Iris — the full care guide.
Iris 'Clarence' problems — FAQ
Why is my iris 'clarence' bacterial soft rot?
Buried or overwatered rhizomes turn slimy and foul. Plant shallowly in free-draining soil and cut out rotted tissue immediately.
Why is my iris 'clarence' poor rebloom?
Shade, cold, crowding or under-feeding suppress the autumn flush. Provide full sun, summer feeding and regular division to encourage it.
Why is my iris 'clarence' iris leaf spot?
Damp weather brings fungal brown spots; remove affected foliage and clear autumn debris to limit spread.
Why is my iris 'clarence' iris borer?
Larvae tunnel rhizomes and invite rot, chiefly in North America. Remove dead foliage in autumn and destroy infested rhizomes.