General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: In Water
Wet Mesic
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Maximum recommended zone: Zone 10a
Plant Height: 3 to 6 feet, possibly higher
Plant Spread: 3 to 6 feet
Leaves: Unusual foliage color
Other: Paddle shaped or lance shaped blue-green dusted with white powder.
Fruit: Other: Papery like, containing one seed. Seeds are dark brown with tan speckles when mature.
Fruiting Time: Summer
Late summer or early fall
Flowers: Showy
Flower Color: Other: Violet
Bloom Size: Under 1"
Flower Time: Summer
Underground structures: Rhizome
Suitable Locations: Bog gardening
Resistances: Humidity tolerant
Propagation: Other methods: Division
Other: Cut 4 to 6 inch sections of the rhizome with several growing points.
Miscellaneous: Goes Dormant

Image
Common names
  • Powdery alligator-flag
  • Powdery thalia
  • Water canna
  • Thalia

Photo Gallery
Location: Botanical Garden of Berlin
Date: 2022-06-08
Location: Botanical Garden of Berlin
Date: 2022-06-08
Location: Botanical Garden of Berlin

Date: 2009-10-02
Location: Colchester, Essex, UK.
Date: 2022-08-24
Location: My house Nacogdoches, Tx
Date: Summer
Location: Pacific Northwest, zone 8
Date: 2013-08-26
Photo taken at Oregon Garden in Silverton, Oregon
Location: Ghent University Botanical Garden, Belgium
Date: 2015-08-31
Location: RHS Harlow Carr, Yorkshire, UK
Date: 2016-08-21
Location: Ghent University Botanical Garden, Belgium
Date: 2015-08-31
Location: Ghent University Botanical Garden, Belgium
Date: 2015-08-31
Location: Mercer Botanical Garden  Houston, Tx
Date: 2014-05-20
Location: Pacific Northwest, zone 8
Date: 2013-08-26
Photo taken at Oregon Garden in Silverton, Oregon
Location: Pacific Northwest, zone 8
Date: 2013-08-26
Photo taken at Oregon Garden in Silverton, Oregon
Location: North Carolina Botanical Gardens Chapel Hill, NC
Date: June 2014

Photo Courtesy of Secret Garden Growers.
  • Uploaded by Joy
Location: My house Nacogdoches, Tx
Date: Summer

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