The forecast last night was for an overnight frost that would clear quickly.
How right the forecast was, bright sunshine soon warmed the ice crystals with damaging consequences to the Viburnum bodnantense cultivars. The attached image shows the rapid browning and discolouration that occurs to the open flowers when direct sun expands the frozen ice crystals within the petals.
RBGE Living Collections Accession Factsheet
Accession Number:19699381
Scientific Name:Viburnum × bodnantense Stearn 'Charles Lamont'
Family:Adoxaceae
Genus:Viburnum
Epithet:bodnantense
Plant:19699381C
Location:/Living Collections/Inverleith/D03/J090
Plant:19699381D
Location:/Living Collections/Inverleith/D03/K080
Plant:19699381A
Location:/Living Collections/Inverleith/Q06/1/ZG050
Plant:19699381E
Location:/Living Collections/Dawyck/V03
Plant:19699381B
Location:/Living Collections/Inverleith/D03/I070