Grass-leaved Flag, Fleur-de-lis, Sword Lily, Plum Scented Iris

Iris graminea

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: graminea (gram-IN-ee-a) (Info)
» View all varieties of Iris




6-12 in. (15-30 cm)

12-18 in. (30-45 cm)


9-12 in. (22-30 cm)


USDA Zone 3b: to -37.2 C (-35 F)

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

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:

Full Sun


Parts of plant are poisonous if ingested

Bloom Color:


Bloom Time:

Late Midseason (MLa)




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:

Allow pods to dry on plant; break open to collect seeds

Awards (if applicable):

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Shelburne Falls, Massachusetts

Sherwood, Oregon

Gardeners' Notes:


On Jun 9, 2009, SunnyBorders from Aurora, ON (Zone 5a) wrote:

Beautiful little plant. Quite hardy and vigorous here (zone 5a). Flowers placed a bit low among leaves.


On Feb 28, 2008, altagardener from Calgary, AB (Zone 3b) wrote:

Hardy in zone 3; also called "plum-scented iris".


On Jan 25, 2007, bluespiral from (Zone 7a) wrote:

This species can be germinated from seed, so am sharing some researched germination methods from 2 very credible sources, the better to get an overall feeling for what would work:

1) Tom Cothier's Website:

a) "Impervious seed coats. Shake in dry sand or nick carefully with a file.

b) "Sow at 18*C - 22*C (64*F - 71*F) for 2 - 4 weeks, move to -4*C to +4*C (24*F - 39*F) for 4 - 6 weeks, then move to 5*C - 12*C (41*C - 53*C) for germination."

2) from: Ontario Rock Garden Society website:

a) As in Clothier #1a - "Requires scarification. Nick or rub between sheets of sandpaper."

b) "Requires soaking. Place in warm water until seeds swell, usually 24 - 48 hours."
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On Oct 9, 2004, boojum from Shelburne Falls, MA (Zone 5a) wrote:

This is a delicate, multicolored, fragrant flower which I look forward to every year. Foliage and size are unusual. There is nothing as lovely as one blossom and a leaf or two in a small ikebana vase. Although it is rated for zone 6-9, it has grown well for me at 2 locations in zone 5. Likes mulch.