Species Iris, Douglas Iris, Mountain Iris, Pacific Coast Iris

Iris douglasiana

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: douglasiana (dug-lus-ee-AN-uh) (Info)
Hybridized by Herbert (collected by)
Registered or introduced: 1841
Synonym:Iris beecheyana
Synonym:Iris watsoniana
Synonym:Limniris douglasiana
» View all varieties of Iris


Pacific Coast Native (PCN)


12-18 in. (30-45 cm)


24-36 in. (60-90 cm)


USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Sun to Partial Shade


Parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Medium Blue



Medium Purple

Bloom Time:

Late Midseason (MLa)

Very late (VLa)



Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Awards (if applicable):

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant is said to grow outdoors in the following regions:

Alameda, California

Aptos, California

Auburn, California

Crestline, California

Day Valley, California

Fremont, California

Los Altos, California

Los Angeles, California

Montara, California

Mountain View, California

Rio del Mar, California

San Francisco, California

San Jose, California

Saratoga, California

Seaside, California

Sebastopol, California


Portland, Oregon

Seattle, Washington

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Gardeners' Notes:


On Jun 21, 2013, derbeh from Los Angeles, CA (Zone 10a) wrote:

Striking color of Pacific Coast Iris - check my photos. Apparently, this is an unregistered color, or the vendors did not know the name. Information about this plant growing here in Mar Vista (Coastal So Cal): it is an early bloomer - mine bloomed in March and April.


On Jun 16, 2005, cinemike from CREZIERES,
France (Zone 8a) wrote:

Some years ago, I grew a number of irises from a packet of mixed iris seed. Although some of them turned out to be from the iris family rather than the genus, this was the first actual iris to bloom and, given my general ineptitude, I pronounce them 'easy to grow'!!!
(And nice looking too...)


On Apr 23, 2005, CApoppy from Santa Cruz Mountains, CA (Zone 9a) wrote:

This beautiful little iris that is native to our area is cream colored or lavender in the wild. It has been very successfully hybridized to produce stunning flowers in the spring on plants that reach about a foot and a half. It takes little or no water during our dry summers, although it looks raggedy if allowed to go all summer without a drink. It prefers some shade during midday and multiplies over time into a sizable clump that can be divided in the fall.

The deep mahogany and creamy coral-gold cultivar that I have looks particularly stunning with another native, sticky monkey flower (Diplacus aurantiacus) which blooms at the same time and echoes the creamy coral in its smaller contrasting flower form.


On Aug 10, 2001, eyesoftexas from Toadsuck, TX (Zone 7a) wrote:

This beardless hardy Iris from California
has slender, coarse, deep green leaves
that are normally evergreen and spread out to a width of 2 ft. The 3 inch wide flowers are borne in fours or fives on branched stems. They are in shades of blue-purple and lavender, with distinctive veining on the "falls"{the three outer petals}, and appear rom early to mid

Cultivation: This iris tolerates a little lime in the soil, and needs full or partial shade. However it grows well in nuetral or slightly acid soil.

Propagation: Tends to be short lived, but fortunately is easily increased from seed son during autumn in flats of sterile potting soil at 50`F. Alternatively, lift and divide the rhizomes in autumn, but take care that they do not... read more