Data specific to Irises (Edit)
Hybridizer: Jacob Sass
Year Of Registration: 1942
Year Of Introduction (May Differ From Registry): 1942
Classification: Tall Bearded (TB)
Registered Height: 36 inches
Bloom Season: Late
Bloom Color Classification: Yellow
Flower Patterns: Self
Bloom Color Description: Yellow
Beard Color: Yellow
Awards: Honorable Mention: 1943
Award of Merit: 1945
Dykes Memorial Medal: 1948

General Plant Information (Edit)
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Flowers: Showy
Underground structures: Rhizome
Propagation: Seeds: Will not come true from seed
Propagation: Other methods: Division
Parentage: (Prairie Sunset x unknown) X (Golden Age x unknown)
Child plants: 145 child plants

Image
Common names
  • Tall Bearded Iris
  • Iris
Also sold as:
  • Ola Kalá

Photo Gallery
Location: Santa Cruz Mountains, California
Date: 2016-04-26
Location: Washington 8b
Date: 2021-05-12
Location: Sass Memorial Garden near Ashland, Nebraska
Date: 2012-05-04
Location: Castlegar BC
Date: 2015-05-28

Date: 2015-06-17
Location: Cisco, Tx 
Date: 2019-04-20
Location: Castlegar BC
Date: 2015-05-26
Location: Castlegar BC
Date: 2015-05-26
Same plant, different angle
Location: Cisco, Tx 
Date: 2019-04-20
Location: Michigan-my garden
Date: June 2015
Location: Sass Memorial Iris Garden near Ashland, NE
Date: 2015-05-21
Location: Sass Memorial Garden near Ashland, NE
Date: 2010-05-17

Date: 2015-06-17
Location: Southeast Nebraska
Date: 2014-05-24

Date: c. 1951
illustration from the 1951 catalog, Cooley's Gardens, Silverton,
Photo by Misawa77
Location: Washington
Date: 2016-05-19
Location: Washington 8b
Date: 2017-05-22
Location: Sass Memorial Garden near Ashland, NE
Date: 2012-05-04
Location: Sussex, UK
Date: late May 2021
A cool dry spring has resulted in late blooms this year in the UK
Location: Catheys Valley California
Photo courtesy of Superstition Iris Gardens, posted with permissi

Date: c. 1949
illustration from the 1949 catalog, Cooley's Gardens, Silverton,
Location: Front iris garden
Date: 2015-05-22
Ola Kala
Location: In a public garden
Date: 2013-05-04

Photo courtesy of Rainbow Iris Farm

Photo Courtesy of Te Sligte Gardens. Used with Permission
  • Uploaded by Joy

Photo courtesy of Blue J Iris. Used with permission.
This plant is tagged in:
Image Image

« Add a new plant to the database

» Search the Irises Database: by characteristics or by cultivar name

« See the general plant entry for Irises (Iris)

« Visit the Irises forum

« The Irises Database Front Page

« The Plants Database Front Page

Today's site banner is by IrisLilli and is called "Purple Crocus Mix"

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.