What Shrubs and small trees grown for their ornamental, evergreen foliage. Origin Europe, Asia and North America. Many cultivars with variegated leaves are of garden origin. Season Foliage has year-round appeal, although hollies come into their own in winter when female plants bear fruit. Size Variable in size from compact shrubs, such as Ilex crenata, with a height and spread of 90cm, to small trees over 6m high. Conditions They grow on most, reasonably moist but well-drained soils in sun or partial shade.