Tall Bearded Iris (Iris 'The Knockout') in the Irises Database

Common names:
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Data specific to Irises (Edit)
Hybridizer: Tell Muhlstein
Year Of Registration: 1948
Year Of Introduction (May Differ From Registry): 1948
Classification: Tall Bearded (TB)
Bloom Season: Mid Late
Bloom Color Classification: Yellow
Flower Patterns: Self

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: Remembrance X (Ming Yellow x Prairie Sunset)

Image

This Isn't the Color It Was Supposed To BeThis Isn't the Color It Was Supposed To Be
May 1, 2012

You buy a young potted plant at your local garden center that is not yet in bloom. The tag in the pot pictures a beautiful blue-colored flower. Much to your later dismay, the flowers aren't blue at all, but a purplish lavender. What gives?

(Full article22 comments)
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Photo gallery:
Location: Santa Cruz Mountains, CaliforniaDate: 2017-05-13
By Henhouse
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Location: Santa Cruz Mountains, CaliforniaDate: 2017-05-12
By Henhouse
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Discussion Threads about this plant
Thread Title Last Reply Replies
A wander around Iris Sisters Farm, May 2019 by Lestv Sep 2, 2019 11:32 PM 60
2018 Seedlings by ARUBA1334 May 23, 2019 11:22 PM 698
Is there a modern iris like Dusky Challenger? by LynNY Jun 17, 2019 8:25 AM 53
Visit to Salem, Oregon May 18 - 19 by AndreaD May 30, 2018 12:21 AM 16
Some Color comes to Wisconsin! by tveguy3 Jul 18, 2018 9:08 AM 686
Bonnie's Bloomers 2018 by grannysgarden Mar 22, 2019 11:45 AM 1,782
Blooms 2018 by cliftoncat Jan 2, 2019 4:17 PM 2,872
A Record Year by ARUBA1334 Apr 8, 2018 8:16 PM 818
Jan's Rustic Garden by janwax Sep 8, 2019 12:07 AM 2,109
2017 orders by Lestv Sep 18, 2017 10:45 AM 1,756
2016 Orders by Henhouse Oct 20, 2016 4:50 AM 2,169
Let's See Some Historics by Henhouse Aug 19, 2018 12:05 AM 1,911
What did you do in the Iris garden today? by Paul2032 Sep 19, 2019 11:42 PM 17,084
Show Us Your Blooms - Spring 2015 - Part 1 by Moiris Nov 23, 2015 9:29 AM 2,013
Amazing Don, Private Eye - Case of the missing Teenybopper by tveguy3 Jul 31, 2015 10:19 AM 105
Mindless chatter by Muddymitts Sep 12, 2019 1:40 AM 17,756
Stupid things I did while learning to grow irises by tveguy3 Oct 30, 2014 11:33 PM 265
It's Happening! by tveguy3 May 30, 2014 3:28 PM 269
Anyone know the name of this yellow iris? by dave Apr 21, 2014 5:31 AM 61
Let's get this show on the road! by tveguy3 May 25, 2014 2:08 PM 1,561

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