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PlantFiles: Tall Bearded Iris
Iris 'May Allison'

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Cultivar: May Allison
Hybridized by Allison; Year of Registration or Introduction: 1920

» View all varieties of Iris

Class:
Tall Bearded (TB)

Height:
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

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

Sun Exposure:
Full Sun

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Light Blue

Bloom Time:
Midseason (M)
Late Midseason (MLa)

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Flowers are good for cutting

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

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

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By Mainecoon
Thumbnail #1 of Iris  by Mainecoon

By Mainecoon
Thumbnail #2 of Iris  by Mainecoon

By 1913cat
Thumbnail #3 of Iris  by 1913cat

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive Mainecoon On May 29, 2005, Mainecoon from Shepherd, MT wrote:

very Rare iris Pale blue with 6 standards that are two overlapping layers, 3 falls have had good luck with it in
zone 4

Regional...

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

,
Durham, Maine
Robertsville, Missouri
Shepherd, Montana



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