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Tall Bearded Iris
Iris 'Congratulations'

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Congratulations
Hybridized by Keppel
Registered or introduced: 1982
» View all varieties of Iris

Class:

Tall Bearded (TB)

Height:

36-48 in. (90-120 cm)

Spacing:

18-24 in. (45-60 cm)

24-36 in. (60-90 cm)

Hardiness:

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)

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

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

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Parts of plant are poisonous if ingested

Bloom Color:

Blue-Violet

Violet/Lavender

Bloom Time:

Late Midseason (MLa)

Foliage:

Herbaceous

Other details:

Flowers are fragrant

Average Water Needs; Water regularly; do not overwater

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:

Non-patented

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

Regional

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

Tucson, Arizona

Canoga Park, California

South China, Maine

Shepherd, Montana

Auburn, New Hampshire

Belfield, North Dakota

Cincinnati, Ohio

Lynchburg, Ohio

Greeneville, Tennessee

Palo Pinto, Texas (2 reports)

Seattle, Washington

Madison, Wisconsin

Casper, Wyoming

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Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On May 31, 2003, Crimson from Clarksville, TN (Zone 6b) wrote:

Sold as a shade of blue, it's not blue, it's a soft lavender color w/purple. Grows well, needs staking against wind when in bloom. Large flowers, multi-blooms. Grew best in full sun, well watered (not sandy) soil.
Plant info that came with this plant:
Height: 38", Space 18-30" apart, moist/fertile soil, Full sun in
North/Part shade in South, Divide every 3-4 years for best blooms.