Hardy canna (Thalia dealbata)
Also known as: Powdery thalia
Pickerelweed (Pontederia cordata) is an aquatic plant native to the southern and central United States. Found thriving in swamps, ponds, and other wetlands, it can grow up to 1.8 meters tall. Its striking purple flowers, which bloom on tall stalks, make it a popular choice for ornamental aquatic gardens.
In This Article
Attributes of Hardy canna
Lifespan
Perennial
Plant Type
Herb
Plant Height
90 cm to 1.8 m
Spread
60 cm
Leaf Color
Green Blue Silver
Flower Size
2 cm
Flower Color
Purple White
Images of Hardy canna
Quickly Identify Hardy canna
1
Heart-shaped leaves with purple edges, up to 18 inches (45 cm) long, dusted with white powder.
2
Spike of small violet flowers on 8-inch (20 cm) panicles, blooming in pairs above foliage.
3
Dark reddish, unbranched stem with powdery texture, 0.5-1 inch (1.27-2.54 cm) in diameter.
4
Small utricles resembling achenes, rich purple-brown, holding dark brown-black seeds, 0.1-0.2 inches (2.5-5 mm).
5
Grows up to 6 feet (183 cm) tall, spread through rhizomes, thriving in damp conditions.
Scientific Classification of Hardy canna
Phylum
Vascular plants
Class
Monocotyledons
Order
Gingers, bananas, and allies
Family
Arrowroot
Genus
Alligator-flag
Species
Hardy canna
Planting and Growing of Hardy canna
Care Difficulty
Easy
Watering Schedule
Every 8 days
Sunlight Requirements
Full sun
Sunshine Duration
4-8 hours
Ideal Temperature
68-77℉
Soil Type
Potting Mix, Peat Mix
Soil pH
6.5-7.5
Fertilizer Type
Balanced
Pruning Season
Spring, Summer
Pruning Area
Branches, Leaves
Pruning Frequency
2 times a year
Repotting Season
Spring
Pot Type
Plastic, Ceramic
How to Water Hardy canna?
When watering Thalia dealbata, ensure the soil is thoroughly soaked. Aim for about 2000 ml of water to percolate through the soil, keeping it consistently moist but not waterlogged. This reflects the plant's natural habitat in marshy regions.
What are the symptoms of an underwatered Hardy canna?
›
What should I do if my Hardy canna is not getting enough water?
›
What are the symptoms of an overwatered Hardy canna?
›
How to save an overwatered Hardy canna?
›
What Are the Sunlight Requirements for Hardy canna?
Thalia dealbata thrives best in partial to full sunlight, fostering strong, vibrant foliage, and healthy growth. Ideal lighting mimics natural tropical environments, promoting blooming and lush visuals.
More About Sunlight Requirements Techniques→
Optimal Positioning
›
Daily Light Exposure
›
Light Augmentation
›
What Is the Ideal Temperature Range for Hardy canna?
The ideal temperature range for Thalia dealbata is between 68°F and 77°F. This range supports optimal growth and blooming activities, ensuring the plant thrives in its environment. Maintaining this temperature range helps in promoting healthy foliage and preventing stress-related issues.
What Soil is Best for Hardy canna?
Thalia dealbata thrives in a soil that retains moisture well. This helps the plant maintain its lush foliage and vibrant flowers, especially during the warmer months when water evaporation is higher. This plant requires a nutrient-rich soil that offers a balanced supply of essential nutrients. Such soil promotes healthy growth and supports robust flowering, enhancing the plant's ornamental value. Despite needing moisture, Thalia dealbata also benefits from well-drained soil to prevent root rot. This balance ensures that excess water doesn't stagnate around the roots, which is crucial for optimal plant health.
How to Fertilize Hardy canna?
Thalia dealbata appreciates a balanced amount of nutrients. Use a balanced fertilizer with an N-P-K ratio of approximately 10-10-10 or 20-20-20. For liquid fertilizer, dilute to half the recommended strength and apply approximately 500ml per plant. For solid fertilizers, typically scatter a handful around the base of the plant, ensuring not to touch the stems.
How to Prune Hardy canna?
Avoid cutting new shoots or buds, as these are the future of your plant's expansion and floral display. Maintain a balance between removing old growth and preserving new. Dispose of the cuttings properly. Compost healthy material if possible, or discard if the plant material shows signs of disease to prevent reinfection or the spread of pests. Regularly inspect the plant for any signs of pests or diseases, particularly after pruning, as cuts can be vulnerable points for potential infestations.
More About Pruning Techniques→
How to Propagate Hardy canna plant?
1
Start by acquiring healthy seeds from a reliable source. Prepare a seed tray with a well-draining potting mix and plant the seeds at a shallow depth. Keep the tray in a warm, bright location and mist regularly to maintain moisture. Germination typically occurs within a few weeks.
2
Identify a mature Thalia dealbata plant with multiple shoots. Gently lift the plant from the ground and separate the rhizomes using a sharp knife. Each section should have roots and a shoot. Replant immediately, ensuring the new divisions receive adequate water and shade as they establish.
3
Once seedlings are sturdy enough to handle, they should be transplanted into individual pots or directly into the garden. Ensure the soil is nutrient-rich and well-drained. Acclimatize seedlings to outdoor conditions gradually before full transplantation to minimize transplant shock.
How to Repot Hardy canna plant?
1
Thalia dealbata exhibits signs for repotting when the roots start circling the pot or emerge from the drainage holes. Another indicator is a noticeable reduction in growth, as roots need more space to expand.
2
Select a pot that's an inch or two larger in diameter than the current one. Ensure it has adequate drainage holes to prevent waterlogging. The size increase gives roots room to grow without overwhelming the plant.
3
Opt for a soil mix that retains moisture but also drains well to avoid soggy conditions. Adding organic matter like compost enhances nutrient content, supporting healthy root and foliage growth.
