Rhododendron Hybrids / cultivars

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Rhododendron 'Countess of Derby'

Hybridiser:White, H.. Sunningdale, UK (see more plants of this hybridizer)
Status:IRRC registered.
Synonyms:'Eureka Maid'
Height
Height
The figures listed here are averages.

The exact location (altitude, sunlight, soil, climate) can influence growth considerably
in 10 years
150 cm. (5ft.)
Bloom time:late midseasonFlower:broadly funnel-shaped
Type:elepidoteLeaves:obovate
Hardiness:H5
H0 = 0 C (32 F)
H1 = -7 C (20 F)
H2 = -12 C (10 F)
H3 = -15 C (5 F)
H4 = -18 C (0 F)
H5 = -24 C (-10 F)

Registered
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on hirstum.info: 1
R. Countess of Derby per country:
(could be a clue for heat/cold-tolerance)

England : 1


Seed-parentPollen-parent
'Pink Pearl'   Click to see more information

X'Cynthia'   Click to see more information

'George Hardy'   Click to see more information

x'Broughtonii'   Click to see more information

R. catawbiense   Click to see more information

xR. griffithianum   Click to see more information

R. griffithianum   Click to see more information

xR. catawbienseR. arboreum ssp arboreum   Click to see more information

x?


Rhododendron 'Countess of Derby' photos

 
Photo byHarold E. Greer
Location
DateJune, 1991
See high-resolution picture
 

Comments on the photo above:

2012-May-26 Harold Greer: This is not Countess of Derby
Photo byTijs Huisman
LocationRhododendron Park Bremen
Date27 May, 2008
See high-resolution picture
 
Photo byHarry R. Wright
Locationprivate garden Courtenay, British Columbia, Canada
Date20 May, 2007
See high-resolution picture




Send your own information or pictures


Parentage according the IRRC of the Royal Horticultural Society
Involved in other cultivars:Hybridiser
'Anna Rose Whitney'   Click to see more information


  Anna Rose Whitney
R. griersonianum x 'Countess of Derby'Whitney, William E., 1954
'Countess of Derby x Loderi Venus''Countess of Derby' x 'Loderi Venus'No hybridiser registered
'Esther Grace''Countess of Derby' x 'White Swan'Grace, G.D., 1951
'Lucky Strike'R. griersonianum x 'Countess of Derby'van Veen, T. (includes Sr. & Junior), 1958
'Reverend Paul'   Click to see more information


  Reverend Paul
'Point Defiance' x 'Countess of Derby'Vinson, B., 1975
'Trude Webster'   Click to see more information


  Trude Webster
'Countess of Derby' x 'Countess of Derby'Greer, Harold E., 1960
'Van'   Click to see more information


  Van
R. griersonianum x 'Countess of Derby'Whitney, William E., 1930
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Rhododendron cultivars   Hirsutum.info     Project started 03 June 2009