Rhododendron Hybrids / cultivars

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Rhododendron 'Eighteenth of May'

Hybridiser:Clarke, George.W.. Portland Oregon, USA, 1971 (see more plants of this hybridizer)
Status:IRRC registered.
Synonyms:'18th of May'
Height
Height
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:midseasonFlower:funnel-shaped
Type:elepidoteLeaves:narrowly oblong
Hardiness:
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)


Seed-parentPollen-parent
'Britannia'   Click to see more information

X'Loderi King George'   Click to see more information

'Queen Wilhelmina'   Click to see more informationx'Stanley Davies'   Click to see more information

R. fortunei ssp fortunei   Click to see more information

xR. griffithianum   Click to see more information

R. griffithianum   Click to see more information

x??x?


Rhododendron 'Eighteenth of May' photos

 
Photo byBill & Cheryl Gray
LocationCisco Heights National Forest & Rhody Ranch, WA, USA
Date20 June, 2011
See high-resolution picture
 
Photo byBill & Cheryl Gray
LocationCisco Heights National Forest & Rhody Ranch, WA, USA
Date22 June, 2011




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Rhododendron cultivars   Hirsutum.info     Project started 03 June 2009