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■(TB) 'River Hawk'

1978, Plough

'River Hawk' (Gordon Plough, R. 1978). Seedling# 73-63-7. TB, 34" (86 cm). Early to late bloom. Standards flax blue (642/3); falls between royal purple (834) and victoria violet (738), slightly lighter blended edge; wistaria blue beard. 'Rain Shadow' X 'Tropical Night'. Eden Road 1979.

See below:

* * References
A bud of TB River Hawk. Photo taken by Holly Johnson at the Minnesota Landscape Arboretum, zone 4b, 6/05/2017.Top view of style arms of TB River Hawk. Photo taken by Holly Johnson at the Minnesota Landscape Arboretum, zone 4b, 6/05/2017.Photo by C T Iris PatchPhoto by NolaPhoto: IriswarehousePhoto by South Jersey IrisPhoto by Glanavon Iris Patch-New ZealandPhoto by Blue J IrisPhoto by Jeanette GrahamPhoto by Blue J IrisPhoto by Exline Iris GardenPhoto by Dorothy Vande-Wisconsin Iris SocietyPhoto scanned from the Rosalie Figge slide collectionPhoto by Sherry RushPhoto by Blue J IrisPhoto by Iriszkert Szasz-Hungary.Photo scanned from the 1994 CooleyPhoto by Darius Gusas-LithuaniaPhoto by Darius Gusas-LithuaniaPhoto by Mary Hess-Bluebird Haven Iris GardenPhoto by Mary Hess-Bluebird Haven Iris GardenPhoto by His Iris GardenPhoto by Holly JohnsonPhoto by Holly Johnson-Taken at MN Landscape ArboretumPhoto by Holly Johnson-Taken at MN Landscape Arboretumphoto by BillPhoto by Holly Johnson-Taken at MN Landscape ArboretumPhoto by Darius Gusas-LithuaniaPhoto by Exline Iris GardenPhoto scanned from the Bee Warburton slide collectionPhoto scanned from the Bee Warburton slide collection

References:

Awaiting original catalog description
 
 

Culture

Quick Summary of Cultural Directions

Hardiness Zones 4-8 for most varieties, Some cultivars tolerate colder, others tolerate warmer zones (please comment in comment box with your location if this cultivar grows well in zone 3, 4, 9, or 10.)
Exposure Prefers full sun for optimal performance, may still bloom in half-day shade
Water: Prefers well drained good garden soil, Tolerant of dry conditions in established plants, Intolerant of swampy conditions.
PH Prefers Neutral to basic solis 6.1 to 8.5, quite toleranr of more extreme conditions
Fertilizer Prefers rich conditions on relatively inorganic soils.
FURTHER CULTURAL INFORMATION Here

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Your Observations Are Valued. Please make note of bud count, branching, purple based foliage and bloom time, etc. Because these are affected by climate, note date, year and geographic location and write these and other comments in the comment box below.

 

-- EleanorHutchison - 2010-02-14
  • TB 'River Hawk' bloomed at the Minnesota Landscape Arboretum, zone 4b, approximately May 31 - June 16, in 2017. -- HollyJohnson2017-04-01 - 26 Sep 2017
I Attachment Action Size Date Who Comment
20170605_135518TB River Hawk (2RS).jpgjpg 20170605_135518TB River Hawk (2RS).jpg manage 222 K 26 Sep 2017 - 00:59 HollyJohnson2017-04-01 A bud of TB River Hawk. Photo taken by Holly Johnson at the Minnesota Landscape Arboretum, zone 4b, 6/05/2017.
20170605_135604TB River Hawk (2RS).jpgjpg 20170605_135604TB River Hawk (2RS).jpg manage 159 K 26 Sep 2017 - 01:00 HollyJohnson2017-04-01 Top view of style arms of TB River Hawk. Photo taken by Holly Johnson at the Minnesota Landscape Arboretum, zone 4b, 6/05/2017.
River-HawkCT.jpgjpg River-HawkCT.jpg manage 46 K 02 Nov 2011 - 15:22 BetsyHiggins Photo by C & T Iris Patch
River-HawkNN.jpgjpg River-HawkNN.jpg manage 37 K 10 Nov 2011 - 15:06 BetsyHiggins Photo by Nola's Iris Garden
RiverHawk01.JPGJPG RiverHawk01.JPG manage 60 K 21 Jul 2015 - 03:03 TerryLaurin Photo by Glanavon Iris Patch-New Zealand
RiverHawk02.jpgjpg RiverHawk02.jpg manage 66 K 09 Apr 2014 - 20:55 TerryLaurin Photo by Blue J Iris
RiverHawk03.jpgjpg RiverHawk03.jpg manage 109 K 09 Apr 2014 - 20:56 TerryLaurin Photo by Blue J Iris
RiverHawk05.jpgjpg RiverHawk05.jpg manage 44 K 28 Jul 2016 - 21:39 TerryLaurin Photo by Sherry Rush
RiverHawk06.jpgjpg RiverHawk06.jpg manage 118 K 28 Jul 2016 - 21:40 TerryLaurin Photo by Blue J Iris
RiverHawk11.JPGJPG RiverHawk11.JPG manage 77 K 30 Aug 2021 - 01:20 TerryLaurin Photo by Mary Hess-Bluebird Haven Iris Garden
RiverHawk12BHI.jpgjpg RiverHawk12BHI.jpg manage 69 K 01 May 2012 - 14:18 BetsyHiggins Photo by Mary Hess-Bluebird Haven Iris Garden
RiverHawkEI.jpgjpg RiverHawkEI.jpg manage 43 K 18 Dec 2012 - 20:39 BetsyHiggins Photo by Exline Iris Garden
River_Hawk_Iriswarehouse.jpgjpg River_Hawk_Iriswarehouse.jpg manage 46 K 03 May 2013 - 13:15 Main.Iriswarehouse Photo: Iriswarehouse
riverhawk01.jpgjpg riverhawk01.jpg manage 68 K 28 Jul 2014 - 12:21 TerryLaurin Photo by South Jersey Iris
riverhawk02.jpgjpg riverhawk02.jpg manage 52 K 06 Sep 2014 - 14:39 TerryLaurin Photo by Jeanette Graham
riverhawk03.jpgjpg riverhawk03.jpg manage 67 K 27 Jun 2015 - 20:59 TerryLaurin Photo by Exline Iris Garden
riverhawk04.JPGJPG riverhawk04.JPG manage 332 K 15 May 2017 - 03:55 TerryLaurin Photo by Dorothy Vande-Wisconsin Iris Society
riverhawk05.JPGJPG riverhawk05.JPG manage 84 K 16 Jun 2014 - 16:21 TerryLaurin Photo scanned from the Rosalie Figge slide collection
riverhawk06.jpgjpg riverhawk06.jpg manage 37 K 05 Dec 2018 - 19:42 TerryLaurin Photo by Iriszkert Szasz-Hungary.
riverhawk09.JPGJPG riverhawk09.JPG manage 286 K 01 Feb 2021 - 04:05 TerryLaurin Photo scanned from the 1994 Cooley's Iris Gardens catalogue by Terry Laurin
riverhawk10.JPGJPG riverhawk10.JPG manage 86 K 24 Feb 2014 - 20:06 TerryLaurin Photo by Darius Gusas-Lithuania
riverhawk11.JPGJPG riverhawk11.JPG manage 56 K 24 Feb 2014 - 20:08 TerryLaurin Photo by Darius Gusas-Lithuania
riverhawk22.jpgjpg riverhawk22.jpg manage 53 K 31 Jan 2011 - 15:23 BetsyHiggins Photo by His Iris Garden
riverhawk4.jpgjpg riverhawk4.jpg manage 127 K 03 Jul 2020 - 21:28 TerryLaurin Photo by Holly Johnson
riverhawk5.jpgjpg riverhawk5.jpg manage 178 K 21 Jun 2017 - 21:16 TerryLaurin Photo by Holly Johnson-Taken at MN Landscape Arboretum
riverhawk6.jpgjpg riverhawk6.jpg manage 151 K 21 Jun 2017 - 18:50 TerryLaurin Photo by Holly Johnson-Taken at MN Landscape Arboretum
riverhawk7.JPGJPG riverhawk7.JPG manage 38 K 27 May 2013 - 02:28 TerryLaurin photo by Bill's Iris Gardens
riverhawk8.jpgjpg riverhawk8.jpg manage 153 K 19 Jun 2017 - 19:30 TerryLaurin Photo by Holly Johnson-Taken at MN Landscape Arboretum
riverhawk9.JPGJPG riverhawk9.JPG manage 56 K 24 Feb 2014 - 20:04 TerryLaurin Photo by Darius Gusas-Lithuania
riverhawl06.JPGJPG riverhawl06.JPG manage 79 K 06 Jul 2014 - 23:29 TerryLaurin Photo scanned from the Bee Warburton slide collection
riverhawl07.JPGJPG riverhawl07.JPG manage 56 K 06 Jul 2014 - 23:31 TerryLaurin Photo scanned from the Bee Warburton slide collection
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