Rhododendron Hybrids / cultivars

Gallery name starting with: 12ABCDEFGHIJKLMNOPQRSTUVWXYZHOME to hirsutum.info

Rhododendron 'Helgoland'

Hybridiser:Robeneck, H.. Westerstede, Germany, 1977 (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
100 cm. (3ft.)
Bloom time:late midseasonFlower:unknown
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: 4
R. Helgoland per country:
(could be a clue for heat/cold-tolerance)

Finland : 3
Estonia : 1

'Scandinavia'   Click to see more information XR. degronianum ssp yakushimanum 'Hanano-ego'   Click to see more information
'Betty Wormald'   Click to see more information

x'Hugh Koster'   Click to see more information

'George Hardy'   Click to see more information

x?'George Hardy'   Click to see more information


Rhododendron 'Helgoland' photos

Photo byJana Dusátková
Locationprivate garden Černošice, Czech Republic
Date20 May, 2004
See high-resolution picture
Photo byMihkel Saar
LocationHansaplant, Harjumaa , Estonia
Date13 June, 2009
See high-resolution picture

Send your own information or pictures

Rhododendron cultivars   Hirsutum.info     Project started 03 June 2009