Photo by Melody

PlantFiles: Crested Iris
Iris cristata 'Powder Blue Giant'

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: cristata (kris-TAY-tuh) (Info)
Cultivar: Powder Blue Giant

» View all varieties of Iris

6 vendors have this plant for sale.

3 members have or want this plant for trade.

Class:
Species

Height:
6-12 in. (15-30 cm)

Spacing:
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Hardiness:
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Pale Yellow
Blue-Violet
White/Near White

Bloom Time:
Midseason (M)

Foliage:
Herbaceous

Other details:
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens

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:
Unknown - Tell us

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):
Honorable Mention

Click thumbnail
to view:

By flowerhead410
Thumbnail #1 of Iris cristata by flowerhead410

Profile:

No positives
3 neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral celesteresort On Feb 12, 2011, celesteresort from Port Orchard, WA wrote:

I have not grown this plant. There is conflicting information between Dave's Garden PlantFiles and propagator information, at least that's what it appears. PlantFiles states that it needs consistently moist soil and is suitable for bog gardens.
Propagator information indicates that it does best in dry woodland sites (or that type of situation).
If anyone can clarify this information, or correct it, I would appreciate.
celesteresort

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

This plant definitely sets seed, which I just received in generous quantity from the North American Rock Garden Society. Although it probably won't come true to its parent, any and all seedlings will be treasured in my garden.

Neutral Joan On Apr 15, 2006, Joan from Belfield, ND (Zone 4a) wrote:

Collected in wild, west of Litchfield, Kentucky

Regional...

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

Concord, North Carolina
Wilkes Barre, Pennsylvania



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