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About Douglas Iris (Iris douglasiana)
The Douglas Iris (Iris douglasiana) is a common and attractive wildflower of the coastal regions of Northern and Central California and Southern Oregon, with scattered locations inland. The Douglas Iris grows mainly at lower elevations, below 330 feet, though it is occasionally found at heights of up to 3,300 feet.
It is most common in grasslands near the coast; it is regarded as a noxious weed in pastures, because it forms clumps that inhibit other vegetation, and its leaves are bitter and unpalatable to cattle.
Douglas Iris prefers part or full shade and richer soils and is fast growing near the coast. If not planted next to a creek or in a naturally wet area, it likes summer water every 2 to 4 weeks. It is more drought tolerant near the coast where it benefits from cooler temperatures and fog. The flowers can be highly variable in color, and many cultivars are available.
