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PlantFiles: Dutch Iris
Iris x hollandica 'Delft Blue'

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: x hollandica (hol-LAN-dee-kuh) (Info)
Cultivar: Delft Blue

» View all varieties of Iris

Unknown - Tell us

6-12 in. (15-30 cm)
12-18 in. (30-45 cm)

3-6 in. (7-15 cm)

USDA Zone 3a: to -39.9 C (-40 F)
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Medium Blue
Dark Blue
White/Near White

Bloom Time:
Extra early (EE)
Midseason (M)


Other details:
Average Water Needs; Water regularly; do not overwater
Flowers are good for cutting

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

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

Seed Collecting:
Unknown - Tell us

Awards (if applicable):
Unknown - Tell us

Click thumbnail
to view:

By DreamOfSpring
Thumbnail #1 of Iris x hollandica by DreamOfSpring

By DreamOfSpring
Thumbnail #2 of Iris x hollandica by DreamOfSpring

By DreamOfSpring
Thumbnail #3 of Iris x hollandica by DreamOfSpring

By flowerfrenzy
Thumbnail #4 of Iris x hollandica by flowerfrenzy


3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive graceful_garden On Mar 25, 2009, graceful_garden from Hahira, GA (Zone 8b) wrote:

Gorgeous flowers, and they come back reliably with little care. I add bulb fertilizer once per year.

Positive JaxFlaGardener On Mar 31, 2005, JaxFlaGardener from Jacksonville, FL (Zone 8b) wrote:

This is my first year of growing this iris. I am VERY pleased with the color! Perfect for my bed of blue and white flowers. I will add a lot more as time and finances allow.

Positive DreamOfSpring On Mar 30, 2005, DreamOfSpring from Charleston, SC (Zone 9a) wrote:

Described as having the same color as that of Delft Blue pottery. Incredibly, it really does. Mine look exactly like those shown in vendor photos.

However, flowers seem to fade much faster than other Dutch Iris varieties in my garden; seem to be easily damaged by heavy rains, etc.


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

Cottondale, Alabama
Jacksonville, Florida
Hahira, Georgia
Chicago, Illinois
Charleston, South Carolina
Vancouver, Washington

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