Rhododendron Hybrids / cultivars

Gallery name starting with: 12ABCDEFGHIJKLMNOPQRSTUVWXYZHOME to hirsutum.info

Rhododendron 'Grand Slam'

Hybridiser:Greer, Harold E.. Eugene, Oregon, USA, 1982 (see more plants of this hybridizer)
Status:IRRC registered.
Height
Height
The figures listed here are averages.

The exact location (altitude, sunlight, soil, climate) can influence growth considerably
in 10 years
120 cm. (4ft.)
Bloom time:late midseasonFlower:unknown
Type:elepidoteLeaves:unknown
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
In 'Your Garden' you can administrate
your rhododendrons.

To try/see this go 'Home' (top-right).
on hirstum.info: 9
R. Grand Slam per country:
(could be a clue for heat/cold-tolerance)

United States : 4
Canada : 3
France : 1
Netherlands : 1


Seed-parentPollen-parent
'Trude Webster'   Click to see more information

X'Lydia'   Click to see more information

'Countess of Derby'   Click to see more information

x'Countess of Derby'   Click to see more information

'Antoon van Welie'   Click to see more information

x'Day Dream Group'   Click to see more information
'Pink Pearl'   Click to see more information

x'Cynthia'   Click to see more information

'Pink Pearl'   Click to see more information

x'Cynthia'   Click to see more information

'Pink Pearl'   Click to see more information

xR. catawbiense   Click to see more information



Rhododendron 'Grand Slam' photos

 
Photo byHarold E. Greer
LocationEugene, Oregon, USA
Date30 May, 2011
See high-resolution picture
 
Photo byGarth Wedemire
LocationMike Bale's Garden: Lu Zhu, Agassiz, BC, Canada
Date12 May, 2010
See high-resolution picture
 
Photo byGarth Wedemire
LocationMike Bale's Garden: Lu Zhu, Agassiz, BC, Canada
Date12 May, 2010
See high-resolution picture
 
Photo bySteve Henning
LocationFraser Garden, Tauranga, New Zealand
Date29 October, 2003
See high-resolution picture
 
Photo byHarold E. Greer
LocationEugene, Oregon, USA
Date15 May, 2012
See high-resolution picture
 
Photo byHarold E. Greer
LocationEugene, Oregon, USA
DateMay, 1987
See high-resolution picture
 
Photo byHarry R. Wright
LocationHaida Gold Gardens, Courtenay BC, Canada
Date18 May, 2007
See high-resolution picture
 
Photo byHarold E. Greer
LocationEugene, Oregon, USA
Date
See high-resolution picture




Send your own information or pictures


Parentage according the IRRC of the Royal Horticultural Society
Involved in other cultivars:Hybridiser
'The Duchess''Trude Webster' x 'Grand Slam'O'Rourke, H., 1986
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Rhododendron cultivars   Hirsutum.info     Project started 03 June 2009