Viburnum

Viburnum odoratissimum, often called Sweet Viburnum, offers showy, snowy-white spring blossoms with a very appealing scent. The intensely fragrant flowers of the sweet viburnum are tiny - covering the entire canopy of rich, matte-green foliage from spring through summer. The small tree is fast growing, quickly developing into a dense hedge or shrub, great for privacy screening and will tolerate clipping to lower heights. 

Soil: Well-drained, humus-rich soil.
Conditions: Full sun to part shade. Frost and coastal tolerant. 
Size: Height 4-5m x width 3m