Copper iris is a North American wetland perennial with copper-red to deep red flowers and bright green sword-like leaves. It thrives in moist to wet soil and full sun, making it well suited to pond and stream margins.
Family
Iridaceae (Iris family)
Grows as
Perennial
Light
Full sun
Water
Keep the soil consistently moist, especially from autumn through spring when new leaves grow; it can also sit in shallow water.
Soil
Moist, acidic, fertile soil rich in organic matter, pH around 6.5.
Temperature
Hardy to USDA zones 3 to 10; tolerates frost but flowers poorly where summers are cool.
How easy
Easy
Safety
Toxic: The foliage and rhizomes are poisonous to people and can cause serious illness if eaten.
Native range
NC. & SE. U.S.A.
Climate
temperate
About
Iris fulva, also known as copper iris or red flag, is a species in the genus Iris, it is also in the subgenus Limniris and in the series Hexagonae. It is a rhizomatous perennial, endemic to the southern and central United States. It has copper-red to deep red flowers and bright green leaves.
How to grow it
The Louisiana irises generally all have similar cultivation requirements. They need full sunlight (minimum of six hours during summer), moist, acidic soils (pH level of 6.5) with a high organic and high fertility content.
For best flowering, moisture is essential during late autumn, winter and spring times (October to May), when the plant starts to grow new leaves. They can be given a light feed between autumn and spring, if needed.
Safety
Some parts of the iris are poisonous. Because both the foliage and rhizomes are deadly toxic, most mammalian herbivores usually leave iris untouched, although the muskrat (Ondatra zibethicus) occasionally feeds on their rhizomes and lower stems and the white-tailed deer (Odocoileus virginianus) sometimes nibbles the leaf edges.
Text excerpted from the Wikipedia article Iris fulva 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.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.