How to Grow Canna Lily
Canna × generalis
Canna is a tender rhizomatous perennial grown for its bold tropical foliage and vibrant flowers from midsummer to frost. Plant in full sun in rich, moist soil after all frost risk has passed. In cold areas, lift rhizomes in autumn and store frost-free, or mulch heavily in situ. Cut back after first frost blackens the foliage.
Yearly Lifecycle
Care Essentials
Feed fortnightly with a high-potash liquid fertiliser from midsummer until flowering ends. Cannas are hungry plants that benefit from rich soil and regular feeding during active growth.
Watch For
- Frost damage — foliage blackens at first frost
- Slugs and snails on emerging shoots in spring
- Red spider mite in hot dry conditions
- Canna virus (streaked/mottled leaves) — destroy affected plants
Track your Canna Lily care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun
Needs warmth and direct sun to flower well. In cooler areas, a sheltered south-facing position is essential.
💧 Watering
Keep consistently moist during active growth
Water freely during the growing season. Reduce watering after the first frost when the plant enters dormancy.
🌱 Fertilizing
High-potash liquid feed fortnightly from midsummer
Feed every two weeks with a high-potash fertiliser from midsummer until flowering ends to sustain the heavy bloom production.
✂️ Pruning
Deadhead spent stems; cut to 15 cm after first frost
Remove individual spent flower stems during the season. After the first frost blackens foliage, cut all stems to 15 cm before lifting.
❄️ Overwintering
Lift rhizomes after first frost in cold areas
In areas colder than zone 8, lift rhizomes after the first frost. Store in barely moist compost in a frost-free shed or garage at 5-10C.
Growing Tips
Start rhizomes indoors in March
Pot up rhizomes in March in a warm spot to give them a head start. You will get earlier and longer-lasting flowers.
Lift and store in cold areas
After the first frost blackens the foliage, cut stems to 15 cm and lift the rhizomes. Store in barely moist compost in a frost-free place.
Deadhead spent flowers to prolong blooming
Remove individual faded flowers as they finish. Once the whole spike is done, cut the stem back to encourage side shoots.
Feed fortnightly during active growth
Cannas are hungry plants. A high-potash liquid feed every two weeks from midsummer keeps them flowering until frost.
Pests & Diseases
Pest Slugs and Snails
Identification: Large ragged holes in leaves, especially young unfurling foliage; slime trails
- Use beer traps; apply copper tape around containers; encourage hedgehogs and thrushes
- Apply ferric phosphate slug pellets around emerging shoots
Pest Red Spider Mite
Identification: Fine stippling on upper leaf surface; webbing visible in severe cases; leaves bronze and dry
- Mist foliage regularly to raise humidity; introduce Phytoseiulus persimilis predatory mites
- Spray with miticide containing abamectin for severe infestations
Disease Canna Virus Bean Yellow Mosaic Virus
Symptoms: Yellow streaking and mottling on leaves; stunted growth; distorted flowers
Treatment: No cure; destroy infected plants immediately to prevent spread
Prevention: Buy from reputable sources; control aphid vectors; disinfect tools between plants
Disease Grey Mould Botrytis cinerea
Symptoms: Fuzzy grey mould on flowers and damaged tissue; brown rotting of stored rhizomes
Treatment: Remove affected parts; improve ventilation; reduce humidity around stored rhizomes
Prevention: Ensure good air circulation; avoid overhead watering; check stored rhizomes monthly
Popular Varieties
Tropicanna, Wyoming, Durban, City of Portland, Australia, Pretoria
Log Canna Lily in your garden — track growth, care, and harvests year after year
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