Tall Bearded Iris (Iris 'Keystone') in the Irises Database

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

Data specific to Irises (Edit)
Hybridizer: William McKee
Year Of Registration: 1933
Year Of Introduction (May Differ From Registry): 1933
Classification: Tall Bearded (TB)
Bloom Season: Mid Late

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: (Dominion x I. trojana) X Royal Beauty

Discussion Threads about this plant
Thread Title Last Reply Replies
"Goners" 2018 by William Oct 19, 2018 6:44 PM 590
My first tiny of the season! by tveguy3 May 22, 2015 9:35 PM 303
Let's get this show on the road! by tveguy3 May 25, 2014 2:08 PM 1,561
Lets watch our iris grow and bloom by Paul2032 May 17, 2013 7:06 PM 267
Partial sales list by irisloverdee Aug 8, 2012 11:19 AM 10
WooHoo! The first dwarf bearded is blooming by zuzu Apr 29, 2012 10:26 AM 127
What did you order this year? by PollyK Sep 22, 2011 9:56 AM 250

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