Troubleshooting
Canna 'Tropicanna' problems — and how to fix them
Canna 'Tropicanna' (Canna 'Tropicanna') 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
Caterpillars roll leaves and feed within; remove by hand or use Bacillus thuringiensis biological spray.
Spider mites
Common in hot, dry conditions. Maintain humidity, wash leaves regularly, and treat heavy infestations with an appropriate miticide.
Frost damage
Not frost hardy. Lift rhizomes after the first autumn frost and store in dry compost in a frost-free shed or garage.
Canna virus mosaic
Distorted, mottled foliage indicates viral infection. Destroy affected plants and source virus-indexed replacements.
Wind damage
The very large, paddle-like leaves are vulnerable to tearing in strong winds. Site in a sheltered position or provide windbreak protection.
Prevent canna 'tropicanna' problems before they start
Most canna 'tropicanna' issues are care-mismatch, not bad luck. Dial in the basics:
Canna 'Tropicanna' problems — FAQ
Why is my canna 'tropicanna' canna leaf roller?
Caterpillars roll leaves and feed within; remove by hand or use Bacillus thuringiensis biological spray.
Why is my canna 'tropicanna' spider mites?
Common in hot, dry conditions. Maintain humidity, wash leaves regularly, and treat heavy infestations with an appropriate miticide.
Why is my canna 'tropicanna' frost damage?
Not frost hardy. Lift rhizomes after the first autumn frost and store in dry compost in a frost-free shed or garage.
Why is my canna 'tropicanna' canna virus mosaic?
Distorted, mottled foliage indicates viral infection. Destroy affected plants and source virus-indexed replacements.
Why is my canna 'tropicanna' wind damage?
The very large, paddle-like leaves are vulnerable to tearing in strong winds. Site in a sheltered position or provide windbreak protection.