Rhododendron Hybrids / cultivars

Gallery name starting with: 12ABCDEFGHIJKLMNOPQRSTUVWXYZHOME to hirsutum.info

cultivar group 'Yellow Hammer Group'

Hybridiser:Williams, John Charles. Caerhays, Cornwall, England, 1931 (see more plants of this hybridizer)
Status:IRRC registered.
The figures listed here are averages.

The exact location (altitude, sunlight, soil, climate) can influence growth considerably
in 10 years
200 cm. (7ft.)
Bloom time:very earlyFlower:tubular-campanulate
Bloom time duration:13
Bloom time duration 'Yellow Hammer Group'

Observation based on 1 plants,
growing in 1 'My-gardens'.

Exact= 13 days.
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)

In 'Your Garden' you can administrate
your rhododendrons.

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

Netherlands : 6
United States : 1
Canada : 1
France : 1

R. sulfureum   Click to see more information

XR. flavidum   Click to see more information

cultivar group 'Yellow Hammer Group' photos

Photo bySteve Henning
LocationHolejird Gardens, Cumbria, UK
Date04 May, 2008
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Photo byHenk Borsje
LocationPrivate garden, Oudenbosch, Netherlands
Date30 March, 2014
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Photo byHank Helm
LocationHank Helm Garden, Bainbridge Island, WA, USA
Date25 March, 2007
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Photo byJeannie & Calvin Parsons
LocationGlendale Gardens, Victoria, BC, Canada
Date07 April, 2010
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Photo byCoen Zonneveld
LocationPrivate garden, Diepenveen, Netherlands
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Photo byGareth Shearman
LocationPrivate garden, Victoria, BC, Canada
Date20 April, 2012
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Photo byBarbara Kulla
LocationPrivate garden, Vancouver Island, BC, Canada
Date28 April, 2011

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Rhododendron cultivars   Hirsutum.info     Project started 03 June 2009