Tall Bearded Iris (Iris 'North Star') in the Irises Database

Common names:
Give a thumbs up Tall Bearded Iris
Give a thumbs up Iris

Data specific to Irises (Edit)
Hybridizer: Thomas Washington
Year Of Registration: 1940
Year Of Introduction (May Differ From Registry): 1940
Classification: Tall Bearded (TB)
Bloom Season: Mid

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

What's Blooming in AprilWhat's Blooming in April
By LarryR on April 19, 2012

Like many other parts of the Midwest, our spring came early in Iowa this year, with temperatures approaching those of summer. Unfortunately, we are back to reality now, with three successive nights of temperatures in the upper 20s. Some plants suffered visible damage, but many that I expected to see damaged breezed through the cold spell with nary a blemish! Come on into the garden and see what our early spring has wrought.

(Full article39 comments)
Give a thumbs up

Discussion Threads about this plant
Thread Title Last Reply Replies
How to prolong iris blooming season? by WAMcCormick Sep 28, 2020 9:00 PM 6
California Fires by irisarian Aug 27, 2020 10:30 PM 78
First irises, browning tips by LisaLisa1001 Apr 30, 2020 11:24 AM 8
Carolina in Blooms, 2020 by Lestv Jul 10, 2020 11:08 AM 390
Final year of evaluation before introduction 2021 by TBManOR May 15, 2020 6:58 PM 72
Louisiana Iris by Maryl Jan 19, 2020 3:31 PM 5
Season 2020 by shizen Jan 3, 2021 6:48 PM 1,775
Close Encounters in the Garden by janwax Jan 14, 2020 10:54 PM 44
Iris Pruning by cchrabot Aug 7, 2019 11:59 AM 6
Nothin' Could Be Finer Than to Be In Carolina - 2019 blooms by Lestv Jan 21, 2020 11:52 PM 789
California Dreaming.... by evelyninthegarden Dec 23, 2020 10:17 PM 1,678
Bonnie's Bloomers a.k.a. Fellowship of the Garden by grannysgarden Jan 3, 2021 7:08 PM 2,736
Bloom Out Survey and Problem Solving by William May 31, 2019 3:43 AM 42
What are your top ten irises from 2018? by evelyninthegarden May 5, 2019 8:28 PM 246
Blooms 2019 by cliftoncat Mar 11, 2020 9:12 PM 2,568
2019 Orders Already! by LizinElizabeth Jun 25, 2019 7:21 AM 833
Monty's Blue Ridge Gardens by UndyingLight Oct 10, 2020 11:10 PM 871
If and When by Tisha Sep 30, 2018 8:05 AM 29
2018 Irises - Purchased and gifted alike! by UndyingLight Aug 20, 2018 8:55 PM 14
Starting Iris seeds.... by evelyninthegarden Mar 20, 2020 9:08 PM 502

« 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 greenappleagnes and is called "Yoshino Cherry"

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