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Northwest Blooms · Irises

Iris 'Blackwater'

Blackwater Iris

Iris 'Blackwater'
Height
38 inches
Width
1 to 1 1/2 feet
Flower color
Smoky purple-black to near-black with black beards
Foliage color
Medium green, upright, sword-shaped foliage
Bloom time
Midseason
Light
Full sun
Water
Moderate, drought tolerant once established
Growing zone
USDA zones 4 to 8

About this plant

Iris 'Blackwater' is a tall bearded iris with exceptionally dark, velvety flowers that bloom in midseason. The upright standards are a deep smoky purple-black, while the broad, ruffled falls deepen to an almost true black. Matching black beards blend into the petals rather than creating the contrasting accent seen on many dark irises, giving each flower a remarkably unified appearance. Subtle purple undertones become more apparent as the light moves across the petals. Upright, sword-shaped green foliage forms tidy fans beneath the flowering stems.

Introduced by Schreiner's Gardens in 2014, 'Blackwater' received an American Iris Society Honorable Mention in 2016. Its near-black coloring provides unusual depth in a sunny planting and makes an effective counterpoint to pale or brightly colored flowers. Cream, yellow, apricot, and soft blue are particularly effective nearby, where their lighter colors emphasize the darkness of the blooms.

Works well in

Formal Gardens · Borders · Cut Flower Gardens · Mediterranean Gardens · Walkways

Companion plants

Dwarf golden barberry · White rockrose · Apricot yarrow · Blue flax · Yellow evening primrose · Silver cotton lavender · Creeping soapwort

Design tip

Use 'Blackwater' where its dark flowers will be seen against a lighter backdrop rather than deep green foliage. Pale stone, gravel, or cream-colored flowers sharpen its silhouette, while several plants repeated together create a stronger pool of near-black color.

Where to see it

This plant can be seen at Schreiner's Iris Gardens.