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| Category: Perennial |
| Family: Marantaceae (Arrowroots) |
| Origin: Southern States (North America) |
| Flower Color: Purple |
| Bloomtime: Summer |
| Height: 4-6 feet |
| Width: Spreading |
| Exposure: Sun or Shade |
| Irrigation (H2O Info): Aquatic |
| Winter Hardiness: 30-32° F |
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Thalia dealbata (Aquatic) (Blue Canna) - Spike of small purple flowers held high above foliage in summer. The slim cordate leaves grow on long petioles to 6 ft. tall, similar to Strelitzia. Spreads at a moderate rate by rhizomes. Prefers damp soil to submersion (to 18 inches) in full sun to light shade. The name for the genus honors German physician Johannes Thal (1542-1583) and the specific epithet means "whitened" or "covered with a white powder". Also known commonly as Alligator flag. Though we list this plant as hardy only to 30-32° F, if the roots do not freeze, it can survive through the winter and we have been notified that plants have survived in locations in USDA Zone 8a in a pond that froze solid after temperatures dropped to 5° F.
The information about Thalia dealbata (Aquatic) displayed on this web page is based on our research conducted in the nursery's horticultural library and from reliable online resources. We also include observations made about it as it grows in our nursery gardens and other gardens we have visited, as well how the crops have performed in containers in our nursery field. We will also incorporate comments we receive from others and welcome hearing from anyone with additional information, particularly if they can share cultural information that would aid others in growing this plant. |
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