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Alligator-flag

Thalia

Also called Alligatorflag

Alligator-flag
Photo: Denis.prévôt, CC BY-SA 3.0

Thalia is a genus of aquatic and marsh plants in the arrowroot family, with the roots and rhizomes often submerged and leaves rising above the water. Keep them wet or in shallow water, and protect them from frost.

Family
Marantaceae (Prayer-plant family)
Grows as
Aquatic
Light
Full sun, Part shade
Water
Keep roots constantly wet, or grow in shallow water.
Soil
Heavy, moisture-retentive mud or loam, or a pond-margin planting medium.
Temperature
Semihardy; protect from frost, roughly 10–30 °C is comfortable.
How easy
Moderate

About

Thalia is a genus of flowering plants in the Marantaceae (prayer plant and arrowroot) family found mainly in aquatic, marshy and riparian zones in Eastern, Central and Western Africa—as far south as Zimbabwe—and the Americas, from Illinois in the north, through northern Argentina in the southern part of its range. These plants can (and prefer to) grow with their roots and rhizomes fully submerged and their foliage growing emersed from the water's surface. They thrive in floodplains, vernal pools and other seasonally-inundated areas, as well. Alligator-flag is a common name for plants in this genus. The generic name is in honor of Johannes Thal (1542–1583), a German doctor who wrote A Flora of the Harz Mountains.

How to grow it

Semihardy in cultivation, it needs protection against frosts. It can be propagated by seed or division of the rootstock in the spring.

Other Thalia plants

Powdery alligator-flag · Bent alligator-flag

Text excerpted from the Wikipedia article Thalia (plant) by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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