Iris douglasiana

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Iris douglasiana
Iris douglasiana

Species Name: Iris douglasiana
Common Name: Douglas Iris

Beautiful deep purple iris flowers with yellow and white blaze. Fabulous under oaks or in other shady dry places. Can tolerate full sun on coast, and part sun to shade inland. Looks good in masses or as accent.

Plant Family: Iridaceae
Plant Type: Perennial
Height by Width: 1' H x 2' W
Growth Habit: Clumping, spreading
Deciduous/Evergreen: Evergreen
Growth Rate: Moderate
Sun Exposure: Full sun to part shade
Soil Preference: Well-draining, rocky, acidic
Water Requirements: Occasional to moderate
Cold Hardy to: 15 degrees F
Flower Season: Spring
Flower Color: Purple
Endangered?: Not listed
Distribution: Northwestern CA, Central Western CA, northern areas of Southwestern CA
Natural Habitat: Grassy places near the coast, generally below 8500'

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Care and Maintenance

  • From California Native Plants, Theodore Payne's 1941 catalog: "Flowers 2 to 3 inches in diameter, pale lilac to deep purple. Grows 1 to 2 feet high. A very satisfactory plant when once established, increasing rapidly and flowering profusely. Gallon cans, 35c."
  • Harlow, Nora and Kristin Jakob. Wild Lilies, Irises, and Grasses: gardening with California Monocots. Berkeley and Los Angeles, CA: University of California Press. 2003.

Other Names
  • Bornstein, Carol, David Fross, and Bart O'Brien. California Native Plants for the Garden. Los Olivos, CA: Cachuma Press. 2005.