Northwest Blooms · Irises
Iris 'Blackwater'
Blackwater Iris

- 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.
