Toughleaf iris (Iris tenax)

Toughleaf iris

Also known as: Oregon Flag, Klamath iris, Tough-leaved iris

Toughleaf iris (Iris tenax) is a perennial evergreen plant that grows in clumps and blooms in spring with pale-lavender to violet-blue flowers. Thrives in full sun to partial shade and is drought-tolerant once established. Flowers attract butterflies and bees. Resistant to aphids rabbits and deer.

Scientific classification

Species

Toughleaf iris (Iris tenax)

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Toxic to Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

Spring, Early summer, Mid summer

Bloom Time

20 cm to 36 cm

Plant Height

40 cm

Spread

8 cm to 10 cm

Flower Size

Spring, Summer

Growth Season

Moderate

Growth Rate

Images of Toughleaf iris

Attributes of Toughleaf iris

Growth Rate

In Spring and Summer, the Toughleaf iris (Iris tenax) exhibits a moderate growth, progressively developing a thick, sword-shaped foliage. Its unique growth rate in the active season results in a hearty display of robust, vibrant flowers - the definitive characteristic of toughleaf iris. While toughleaf iris may experience a slower growth during other seasons, it is this moderate growth rate in Spring and Summer that ensures sustained blossoming, resilience in varying weather conditions, and an ultimately striking visual presence in the garden.

Culture

Symbolism

Faith, Valour, Wisdom

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Care Guide for Toughleaf iris

Every week

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Toughleaf iris thrives in moist conditions, requiring consistent hydration but tolerates short dry spells. Preferring evenly moist soil, it should be watered weekly. Typically cultivated outdoors, toughleaf iris adapts well to temperate climates, handling seasonal rain fluctuations effectively.

Fertilize: For optimal growth, feed toughleaf iris with balanced fertilizers in early spring and switch to high-phosphorus during blooming. Apply every 4-6 weeks while adjusting rates for winter dormancy. Following product guidelines ensures healthy growth and improves disease resistance in toughleaf iris.

Pruning: The toughleaf iris thrives with early spring or late winter pruning to remove dead foliage and spent flower stalks, promoting healthy growth and blooms. This practice enhances air circulation, minimizes disease risk, and rejuvenates the plant. Refer to trusted horticultural resources for tailored care guidance.

Propagation: Toughleaf iris is a flowering perennial that thrives in natural conditions. Propagating through division involves delicately separating rhizomes with growth points. Immediate replanting in well-draining soil, with proper spacing for airflow, ensures robust growth and a vibrant floral display.

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