Giant Canna (Canna tuerckheimii)

Giant Canna

Canna tuerckheimii

Broad tropical leaves unfurl like living parasols, bold and lush. Tall herbaceous perennial; common name: Tuerckheim's Canna.

Full sun
2–3/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; prefers bright, direct light for optimal flowering; tolerates dappled shade in intense heat
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Watering Keep soil consistently moist but not waterlogged; ensure well-draining soil to prevent root rot
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Temperature Thrives in warm tropical to subtemperate conditions; protect from frost below 10°C to avoid foliage damage
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Characteristics

  • Leaf: Large paddle-shaped foliage, glossy green to bronze, up to 1 m long with prominent veins
  • Flower: Tubular orange-red to deep pink blooms clustered on tall, upright spikes
  • Stem: Thick, succulent upright stems, green to reddish-green in color
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Care Guide

Watering

Keep soil evenly moist; water deeply when the top 2 cm of soil dries out

Fertilization

Feed with balanced organic fertilizer every 2 weeks. Avoid over-fertilizing to prevent excessive foliage growth at the expense of flowering

Banana peel compost tea:Use fully composted banana peels; steep in water for 24 hours, dilute 1:20 for root drench to avoid pest infestations
Pruning
  • Deadhead spent flower spikes promptly to encourage continuous blooming throughout the growing season
  • Cut back yellowing or damaged foliage to maintain a tidy clump and improve airflow
  • Trim stems to 15 cm above soil level after the first frost in temperate regions to prepare for winter dormancy
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no adverse effects from ingestion or contact

Humans: No documented toxicity to humans; safe for handling and decorative use

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden focal point; cut flower arrangements; large indoor foliage display