R. johnstoneanum 'Double Diamond'

Species selection of R. johnstoneanum

Selected By	Crown Estate Commissioners
Introduced	1962
10 Year Height	107 cm. (4ft.)
Bloom Time	midseason
Flower	funnel-shaped
Flower Color	cream
Fragrance	Medium-Scent
Leaves	obovate to elliptic
Leaf persistence	Evergreen
Type	Lepidote
Plant Hardiness	-18 C (0 F)
Flower Bud Hardiness	?
Registration	Unknown or not recorded
Extra Information	This plant can grow leggy over time, so pinching buds or pruning can help improve it's habit.

Title R. johnstoneanum 'Double Diamond' Photo By Thatrhodylady Date Taken April 29, 2025 Location Rhododendron Species Botanical Garden License CC BY 4.0 Attribution Text: Thatrhodylady via Rhododendra.com, CC BY 4.0 Sizes small 648 x 1152, 48 KB medium 1350 x 2400, 199 KB Full 2268 x 4032, 4.9 MB Description R. johnstoneanum 'Double Diamond' flowers, reminiscent of a gardenia flower.
Title R. johnstoneanum 'Double Diamond' Photo By Thatrhodylady Date Taken April 29, 2025 Location Rhododendron Species Botanical Garden License CC BY 4.0 Attribution Text: Thatrhodylady via Rhododendra.com, CC BY 4.0 Sizes small 648 x 1152, 37 KB medium 1350 x 2400, 157 KB Full 2268 x 4032, 2.3 MB Description R. johnstoneanum 'Double Diamond' flower and hairs along the margins of the leaves.
Title Double Diamond Photo By Garth Wedemire Date Taken March 26, 2005 Location Rhododendron Species Botanical Garden, Federal Way, Washington, USA License CC BY 4.0 Attribution Text: Garth Wedemire via Rhododendra.com, CC BY 4.0 Sizes small 768 x 510, 55 KB medium 1200 x 798, 265 KB
Title Double Diamond Photo By Everard Daniel Date Taken April 7, 2003 Location Borde Hill garden, Sussex, UK License Copyright, Everard Daniel. Sizes small 768 x 576, 46 KB medium 1200 x 900, 202 KB