Blood iris (Iris sanguinea): colours, meaning, where it grows and when it blooms

Blood iris is a perennial iris from eastern Asia, found in places like Japan, China, Russia, Mongolia, and Korea. Its flowers range from blue and purple to red-violet, with rare white forms, and it is grown for its showy blooms in gardens and near water.

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Native to Russia, Mongolia, China, Korea, and Japan
Flowers range from blue and purple to red-violet, with rare white forms
Grows in damp meadows and along streams
All parts are toxic if eaten or handled
Known as ayame in Japan and xi sun in China

What does Blood iris look like?

Blood iris grows from thick, creeping rhizomes and forms upright, narrow leaves that are grey-green and can reach up to 60 cm. Its hollow stems carry two or three flowers at the top, each about 6–8 cm wide. The blooms show shades from blue and purple to red-violet, sometimes white. The outer petals, called falls, droop and display colored veins, while the inner petals stand more upright. After flowering, it forms a long seed capsule.

Where does Blood iris come from?

This iris is native to damp meadows, stream banks, and forest edges across eastern Russia, Mongolia, northern China, Korea, and Japan. It has been known in these regions for centuries and was first described in Europe in the early 1800s. The name 'sanguinea' refers to the reddish tones in its flower parts. Recent studies have shown it is very closely related to other Siberian irises, and some botanists now group them together.

When and how Blood iris blooms

Blood iris blooms from late spring to early summer. It prefers moist, well-drained soil with some organic matter and does best in full sun but can handle partial shade. It is usually grown from divisions of its rhizomes, which are split and replanted after flowering. Seeds can also be sown outdoors in autumn. The plant is hardy and tolerates cold winters, but does not thrive in soggy conditions.

How Blood iris is used

Gardeners value blood iris for its colorful flowers and use it in borders, near ponds, and in naturalistic plantings. It is also grown as an ornamental in temperate gardens worldwide. Some regions consider it a local emblem, and it is one of the irises called 'Japanese iris.' However, all parts of the plant are toxic if eaten, and handling may irritate the skin.

Kinds of Blood iris

There are many cultivated forms and hybrids, some bred for deeper violet or blue shades, and a rare white-flowered type exists. Japanese forms such as Iris sanguinea var. violacea have larger, richly colored flowers. Blood iris has also been crossed with other iris species to create new garden varieties.

What Blood iris means

Blood iris is associated with Japanese gardens and is one of the traditional 'Japanese irises.' Its name in Japanese, ayame, is written in several ways. The plant is sometimes used as a symbol in local emblems. Because of its striking flowers, it is a favorite in garden design across its native range.

Where Blood iris is used and seen

BouquetA creative arrangement of flowers, given or displayed for many occasions

Hakone Botanical Garden of WetlandsA garden of wetland and alpine plants in Hakone, Japan

Parc floral de ParisA botanical garden and flower park in the Bois de Vincennes, Paris

Parc Floral de la SourceA large public garden in Orléans built around the source of the Loiret river

KeukenhofA vast Dutch flower garden famous for its spring tulip displays

KanzashiTraditional Japanese hair ornaments, often crafted as folded silk flowers

HanafudaJapanese playing cards with flower designs used for traditional games

History of flower arrangementHow arranging flowers became an art across cultures and centuries

Questions people ask about Blood iris

Where does blood iris come from?

Blood iris is native to eastern Asia, found in regions of Russia, Mongolia, China, Korea, and Japan. It grows wild in damp meadows, along streams, and at the edges of forests.

What does blood iris look like?

This iris has narrow, grey-green leaves and hollow stems topped with two or three flowers. The blooms are usually blue, purple, or red-violet, but white forms are rare. The flowers are about 6–8 cm across.

Is blood iris poisonous?

Yes, all parts of the blood iris are toxic if eaten and can cause stomach upset or vomiting. Handling the plant may also lead to skin irritation or allergic reactions.

How is blood iris used?

It is grown as an ornamental in gardens, especially near water or in borders. It is also valued as a local emblem in some regions and is one of the irises called 'Japanese iris.'

Are there different types of blood iris?

Yes, there are many cultivated varieties and hybrids, including forms with deeper colors and rare white-flowered types. In Japan, a variety called Iris sanguinea var. violacea is known for its large, deep violet flowers.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Iris sanguinea", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

Bouquet: James Vick's Sons (Rochester, N.Y.); Henry G. Gilbert Nursery and Seed, No restrictions, source

Hakone Botanical Garden of Wetlands: 663highland, CC BY 2.5, source

Parc floral de Paris: Christophe Meneboeuf, CC BY-SA 3.0, source

Parc Floral de la Source: Croquant, CC BY-SA 4.0, source

Chrysanthemum: Muhammad Mahdi Karim, GFDL 1.2, source

Birch: Willow, CC BY 2.5, source

German iris: Za, CC BY-SA 3.0, source

Keukenhof: Balou46, CC BY-SA 3.0, source

Peach: Jack Dykinga, USDA, Public domain, source

Gladiolus: Gere72, CC BY-SA 3.0, source

Saffron crocus: KENPEI, CC BY-SA 3.0, source

Kanzashi: Anonymous ( Japan ) Unknown author, Public domain, source

Hanafuda: Marcus Richert, CC BY 2.0, source

History of flower arrangement: Otto Scholderer, Public domain, source

Crocus: Meneerke bloem, CC BY-SA 3.0, source

Sacred lotus: T.Voekler, CC BY-SA 3.0, source

Blood iris