Rhododendron molle
Wryneck is a compact, hardy and upright growing deciduous shrub with bright green foliage and is a sub-genus of the rhododendron family.
In mid-late spring, huge, showy trusses of single, trumpet-shaped blooms in sulphur-yellow with pink edging make a spectacular display. Prefers full sun to dappled shade and well-drained, humus-rich, slightly acidic soil.