Iris tenax
A Pacific Coast native iris with narrow evergreen foliage forming clumps. Flowers range from deep purple to blue to occasionally cream, often with intricate veining. Spreads gradually by rhizomes. More drought-tolerant than bearded iris once established.
Native to Oregon and Washington in open woods and meadows. Prefers well-drained soil with some summer moisture. The evergreen foliage provides year-round interest. Best moved immediately after flowering. Suitable for naturalistic plantings and native gardens. The variable flower colours add interest to mixed plantings.
Growing Conditions
Light: part shade to full sun
Moisture: average
Soil: well-drained with some summer moisture
Hardiness zone: 7
Maintenance: low to moderate
Size & Habit
Height (cm): 30
Spread (cm): 25
Habit: clumping
Seasonal Interest
Flowering period: Apr–May
Seasonal interest: spring bloom; evergreen foliage year-round; native plant
Foliage: green evergreen
Flower: purple to blue to cream
Ecology & Notes
Wildlife value: pollinators
Deer/Rabbit resistance: yes
Habitat: native gardens; naturalistic plantings; well-drained sites
Features: Pacific Coast native; variable colors; evergreen foliage; rhizomatous; drought-tolerant; intricate veining
Notes: native to OR and WA; evergreen; more drought-tolerant than bearded iris; variable colors; move after flowering