Hardy canna (Thalia dealbata)

Hardy canna

Also known as: Powdery thalia

Hardy canna (Thalia dealbata) is an aquatic plant found in the southern and central United States. It roots in swamps, ponds, and other wetlands, and can reach 1.8 m in height. The attractive purple flowers that bloom atop its stalks have made hardy canna a common aquatic ornamental plant.

Scientific classification

Species

Hardy canna (Thalia dealbata)

Gingers, bananas, and allies

Instantly identify plants with a snap

Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.

Download the App for Free

Perennial

Lifespan

Herb

Plant Type

Summer, Early fall, Mid fall

Bloom Time

90 cm to 1.8 m

Plant Height

60 cm

Spread

Green, Blue, Silver

Leaf Color

2 cm

Flower Size

Purple, White

Flower Color

Green, Gray, Silver

Stem Color

Rapid

Growth Rate

Images of Hardy canna

Distribution of Hardy canna

Distribution Map

Hardy canna is a plant native to the freshwater wetlands of subtropical and tropical America. It has also been introduced to new locations across various continents, prominently in temperate and tropical regions in Eastern Asia. This plant thrives in both its native habitat and in cultivation, often found in ornamental ponds and water gardens beyond its indigenous range.

Native

Cultivated

Invasive

Introduced

No species reported

Discover plant distribution and habitat

Gain insights into where plants thrive and how they adapt, helping you identify, cultivate, and protect them with essential information on habitats, distribution maps, and climate trends.

Download the App for Free

Habitat

Cypress swamps, marshes, ponds

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Hardy canna

Heart-shaped leaves with purple edges, up to 18 inches (45 cm) long, dusted with white powder.

Spike of small violet flowers on 8-inch (20 cm) panicles, blooming in pairs above foliage.

Dark reddish, unbranched stem with powdery texture, 0.5-1 inch (1.27-2.54 cm) in diameter.

Small utricles resembling achenes, rich purple-brown, holding dark brown-black seeds, 0.1-0.2 inches (2.5-5 mm).

Grows up to 6 feet (183 cm) tall, spread through rhizomes, thriving in damp conditions.

Identify plants with a snap

Instantly identify plants with AI: Snap a photo, and get accurate results within seconds.

Download the App for Free

Care Guide for Hardy canna

Twice per week

Water

Full sun

Sunlight

10 - 38 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Hardy canna thrives in wetland environments and prefers consistent hydration, requiring watering twice a week. It tolerates brief dry spells and flourishes in standing water, making it ideal for pond margins or bog gardens where light and water enhance its growth.

Fertilize: Hardy canna thrives with efficient fertilization, requiring a balanced 10-10-10 blend every 4-6 weeks during growth. A high phosphorus fertilizer aids blooming. Feed monthly; avoid over-fertilizing to prevent burn. During dormancy, minimal nutrients suffice for health and vigor.

Pruning: Hardy canna flourishes in marshy habitats with large blue-green leaves and purple spikes. Prune in early spring or late winter by cutting back dead foliage. Regular thinning enhances air flow, manages size, and promotes growth. Use sharp tools to prevent disease for healthier plants.

Propagation: Hardy canna is a perennial herbaceous species thriving in wetland conditions, valued for its ornamental quality. Propagation is best achieved through division, typically in early spring or post-flowering, ensuring rhizomes are replanted promptly in moist soil for quick establishment.

Get tips and tricks for your plants.

Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.

Download the App for Free