Blue iris (Iris spuria)

Blue iris

Also known as: Butterfly iris

The blue iris (Iris spuria) is among the tallest irises, reaching heights of 91 to 183 cm. It is a common victim of several insects including the iris borer, but it attracts butterflies. The blue iris is also called beardless because it lacks the fuzzy, beardlike tuft at the center of "bearded" irises.

Scientific classification

Species

Blue iris (Iris spuria)

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Toxic to Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

Spring, Summer

Bloom Time

50 cm to 80 cm

Plant Height

90 cm

Spread

Green, Gray, Blue, Silver

Leaf Color

2.5 cm

Flower Size

Brown, Copper

Fruit Color

Blue, White, Yellow, Purple, Violet

Flower Color

Green, Gray, Silver, White, Yellow, Purple, Blue

Stem Color

Deciduous

Leaf type

Images of Blue iris

Distribution of Blue iris

Distribution Map

Blue iris is a plant originating from temperate and submontane zones across Europe, the Middle East, and Northern Africa. It has been introduced and cultivated in parts of Northern Europe, reflecting its adaptability to different environments. The plant thrives in both its native habitat and in cultivation, marking its presence beyond its natural range.

Native

Cultivated

Invasive

Introduced

No species reported

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Hemisphere Trend Curve

Northern

Sorthern

Culture

Garden Use

Blue iris can truly stand out in your garden because this is among the tallest varieties of iris available. The attractive clumps of foliage and tall blue or lilac-colored flowers, often with yellow bands, make an appealing background in sunny flower beds and garden borders.

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Toxicity

All parts of the blue iris are toxic to cats, especially the bulbs, causing vomiting, diarrhea, and ulcers. For dogs, the roots are most toxic, leading to drooling, vomiting, and lethargy. Severe cases are rare but may result in coma or death.

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Quickly Identify Blue iris

Lofty perennial reaching up to 5 feet (1.5 meters) with dense clumps.

Distinctive flowers in bluish-purple, white, blue, purple, wine, and brown hues.

Oblong-ovate, hexagonal seed capsule up to 4 inches (10 cm) with beak-like appendage.

Slender, vibrant green linear leaves reaching 4 feet (120 cm) in length.

Sturdy, erect stem growing up to 5 feet (152 cm) with minimal branching.

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Care Guide for Blue iris

Every week

Water

Full sun

Sunlight

0 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Originating from marshy areas, blue iris thrives in moist conditions and prefers consistent hydration. While moderately drought-tolerant, it flourishes with regular weekly watering. As an herbaceous perennial, blue iris benefits from outdoor cultivation, utilizing seasonal rainfall for optimal growth and water uptake.

Fertilize: For blue iris, use balanced nutrition fertilizers monthly during the growing season to promote growth and blooms. High phosphorus types boost flowering. Adjust frequency during dormancy and follow package instructions. Apply cautiously to avoid root burn or damage to leaves and blooms, and wear gloves.

Pruning: Pruning blue iris in early to late spring promotes health and new growth. Remove dead foliage and cut spent flower stems to the base. This practice prevents overcrowding, enhances air circulation, and reduces disease risk, leading to more vibrant blooms during the growing season.

Propagation: The perennial blue iris features striking bluish-purple flowers and is adaptable to various conditions. Propagation is achieved through division; caregivers should split rhizomes gently, ensuring roots are protected. Consistent moisture and well-draining soil are crucial for healthy growth during root establishment.

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