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PlantFiles: Louisiana Iris
Iris 'Kentucky Thoroughbred'

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: Kentucky Thoroughbred
Hybridized by Bruner; Year of Registration or Introduction: 2002

» View all varieties of Iris

Class:
Louisiana (LA)

Height:
24-36 in. (60-90 cm)

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

Hardiness:
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

Danger:
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color:
Bright Yellow
Blue-Violet
Violet/Lavender

Bloom Time:
Late Midseason (MLa)

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:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)

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):
Honorable Mention

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to view:

By Joan
Thumbnail #1 of Iris  by Joan

Profile:

1 positive
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive KanapahaLEW On May 27, 2011, KanapahaLEW from Alachua, FL (Zone 8b) wrote:

Louisianas can grow in regular garden conditions if the soil is somewhat acid and they aren't subject to prolonged drought. Bogs and constant wet are not necessary although that will bring the absolute best results. I have some in soil with a pH of 7.2 but I use azalea/camellia fertilizer and/or aluminum sulfate to increase acidity. I also grow a couple in 5-gallon buckets of soil with no drainage and keep them topped up with water, but rapid rhizome growth requires regular dividing.

Neutral Joan On Aug 17, 2009, Joan from Belfield, ND (Zone 4a) wrote:

Awards: Honorable Mention 2009

Regional...

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

Gainesville, Florida



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