Flowering plant cultivar
Buddleja 'Winter Sun' is a British cultivar raised by Steve Nevard, London, from a crossing of "B. araucana" (formerly "B. nappei") and "B. officinalis". 'Winter Sun' is a winter / early spring flowering shrub of similar size and vigour to "B. officinalis". It has pink-flushed-yellow flowers in terminal clusters of small globose heads, complemented by olive green foliage with a brown tomentose underside.
'Winter Sun' is uncommon. It is not known to be in cultivation beyond the UK. A specimen is grown as part of the NCCPG national buddleja collection held by Longstock Park Nursery near Stockbridge. 
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