Black iris (Iris chrysographes)

Black iris

Native to tropical and subtropical alpine meadows, streamsides and forest margins, the black iris is a perennial herb that grows from a creeping rhizome, forming clumps over time. A favorite for gardeners who can provide it a proper environment, it produces small but spectacular dark purple-black blooms.

Scientific classification

Species

Black iris (Iris chrysographes)

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Toxic to Pets

Toxicity

Perennial

Lifespan

Herb

Plant Type

Late spring, Summer

Bloom Time

41 cm to 51 cm

Plant Height

36 cm to 46 cm

Spread

Green

Leaf Color

Purple, Red, Black

Flower Color

Green, Red, Purple

Stem Color

Distribution of Black iris

Distribution Map

Black iris is indigenous to temperate regions of Asia, specifically within major areas of Southeast Asia. Although not introduced in a wild context, cultivation of black iris has spread beyond its native range, finding a place in gardens and horticultural collections around the world due to its aesthetic appeal.

Native

Cultivated

Invasive

Introduced

No species reported

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Hemisphere Trend Curve

Northern

Sorthern

Cultivars

There are several recognized cultivars of Black iris, including the following common varieties :

Black iris 'black'

Care Guide for Black iris

Every week

Water

Full sun

Sunlight

0 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Black iris thrives in environments with consistent moisture, preferring evenly moist soil. It requires weekly watering and shows moderate drought tolerance once established. As an outdoor plant, it benefits from seasonal rains, aiding its growth cycle and resilience during fluctuating water availability.

Fertilize: For black iris, use balanced or phosphorus-rich fertilizers to enhance root and bloom growth. Apply in early spring and at blooming onset, following recommended amounts. Reduce fertilization during dormancy to avoid stress and waste, and prevent over-fertilization to protect the plant and environment.

Pruning: Prune black iris in early to late spring to eliminate dead foliage and promote vigorous growth and blooming. This timing enhances summer displays and improves air circulation to prevent disease. Use clean, sharp tools for precise cuts, ensuring minimal damage to new shoots.

Propagation: Derived from the Iris family, the black iris is effectively propagated through division of rhizomes, promoting new clusters. Proper planting depth ensures growth stability. Attention to watering and soil conditions post-division optimizes recovery, fostering a robust root system for each newly formed black iris.

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