Northern blue flag iris - Iris versicolor (Care, Characteristics, Flower, Images, Toxic)

Northern blue flag iris

Also known as: Harlequin blueflag, Poison flag

The northern blue flag iris is considered a wetland species, which means it plants well near pond or lake edges, in water meadows, and near other water features. It can tolerate being in standing water that is less than 15 cm deep and can be completely submerged for a short time. The northern blue flag iris is a flowering herbaceous perennial plant that grows 10 to 79 cm high.

Scientific classification

Species

Northern blue flag iris (Iris versicolor)

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Toxic to Human & Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

Summer

Bloom Time

Summer, Fall

Harvest Time

10 cm to 80 cm

Plant Height

Blue, Purple, White, Violet

Flower Color

Green, Purple, Blue

Stem Color

Winter dormancy

Dormancy

Deciduous

Leaf type

0 - 35 ℃

Ideal Temperature

Images of Northern blue flag iris

Distribution of Northern blue flag iris

Distribution Map

Northern blue flag iris is native to North America, where it thrives in wetlands and around water margins. It has been introduced to parts of Northern and Central Europe, reflecting a successful adaptation to various temperate climates. Additionally, northern blue flag iris is cultivated in garden settings for its ornamental value, indicating a broader geographic flexibility beyond its natural range.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Swamps, wet meadows, scrub, by lakes and rivers, wetlands

Hemisphere Trend Curve

Northern

Sorthern

Culture

Garden Use

Those with ponds or creeks in their garden, or very wet and marshy yards, will appreciate the northern blue flag iris for its tolerance of wet soils. It is best grown in clumps, as the leaves and flowers are quite small. Try combining it with Golden sedge for a striking visual effect.

Symbolism

Power, wisdom, faith, courage

Name Story

Northern blue flag iris: The name flag comes from the Middle English word "flagge," meaning rush or reed. To distinguish itself from the Southern blue flag Iris, it is called the Northern blue flag iris.

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Toxicity

Northern blue flag iris is mildly to moderately toxic to humans, causing skin irritation or gastrointestinal symptoms upon contact or ingestion. Northern blue flag iris is toxic to cats and dogs, with its roots, sap, and seeds being the most hazardous parts. Pets may exhibit vomiting, diarrhea, and other symptoms, necessitating immediate veterinary care if ingestion occurs. Gardeners should wear gloves when handling northern blue flag iris.

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Quickly Identify Northern blue flag iris

Sword-shaped leaves up to 3 feet (90 cm) long.

Flowers with 6 petal-like structures, blue, purple, and yellow hues.

Distinct flowers with 3 upright standards and 3 downward-bending falls.

Large flowers up to 4 inches (10 cm) across, in varied colors.

Leaves blue-green, sword-like, up to 2 feet (60 cm) long and glossy.

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Care Guide for Northern blue flag iris

Every week

Water

Full sun

Sunlight

0 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Originating from wetlands, northern blue flag iris thrives in consistently moist conditions and prefers wet soil but can tolerate brief dry spells. Regular weekly watering is essential. As a perennial, it benefits from rainwater, which aids in natural irrigation and nutrient supply.

Fertilize: For healthy growth, northern blue flag iris benefits from balanced nutrition fertilizers, especially high phosphorus blends in spring and summer. Apply quarterly at recommended rates to avoid root burn. Use slower-release options for consistent feeding and stop fertilization during dormancy to allow rest, avoiding over-fertilization damage.

Pruning: Northern blue flag iris thrives with timely pruning in early to late spring. Key practices include removing dead foliage and cutting back spent flower stems to boost growth and blooms. Clean, sharp tools enhance results, supporting overall plant vigor and an attractive garden display.

Propagation: Northern blue flag iris is propagated through division by separating healthy rhizomes with multiple growth points. Plant divisions at the same depth as originals, ensuring moist (not waterlogged) soil to encourage root establishment. This method helps maintain northern blue flag iris's vigor while expanding garden displays.

Repotting: Northern blue flag iris flourishes when repotted every 2-3 years during early spring, aligning with its growth phase. Use a wide, shallow container for its spreading roots. After repotting, maintain consistent moisture and avoid direct sunlight to support recovery and promote vibrant blooms.

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Images of Northern blue flag iris

Distribution of Northern blue flag iris

Culture

Toxicity

Quickly Identify Northern blue flag iris

Care Guide for Northern blue flag iris

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