Troubleshooting
Canna 'Wyoming' problems — and how to fix them
Canna 'Wyoming' (Canna 'Wyoming') 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.
Canna leaf roller
A common pest; larvae roll and feed inside leaves. Remove by hand or apply Bacillus thuringiensis for larger infestations.
Spider mites
Thrive in hot and dry conditions. Maintain humidity, wash leaves, and treat heavy infestations with an appropriate miticide.
Frost and overwintering
Not frost hardy in the UK and colder US regions. Lift and store dry rhizomes in frost-free conditions after the first autumn frost.
Viral mosaic
Irregular yellow mottling and leaf distortion signal canna virus. Remove affected plants immediately and replace from virus-indexed stock.
Wind leaf damage
Large leaves tear in strong winds. Choose a sheltered site or grow in a position with windbreak protection.
Prevent canna 'wyoming' problems before they start
Most canna 'wyoming' issues are care-mismatch, not bad luck. Dial in the basics:
Canna 'Wyoming' problems — FAQ
Why is my canna 'wyoming' canna leaf roller?
A common pest; larvae roll and feed inside leaves. Remove by hand or apply Bacillus thuringiensis for larger infestations.
Why is my canna 'wyoming' spider mites?
Thrive in hot and dry conditions. Maintain humidity, wash leaves, and treat heavy infestations with an appropriate miticide.
Why is my canna 'wyoming' frost and overwintering?
Not frost hardy in the UK and colder US regions. Lift and store dry rhizomes in frost-free conditions after the first autumn frost.
Why is my canna 'wyoming' viral mosaic?
Irregular yellow mottling and leaf distortion signal canna virus. Remove affected plants immediately and replace from virus-indexed stock.
Why is my canna 'wyoming' wind leaf damage?
Large leaves tear in strong winds. Choose a sheltered site or grow in a position with windbreak protection.