Ornamental Rowan Joseph Rock An outstanding ornamental rowan, especially striking in autumn, Sorbus aucuparia Joseph Rock is a medium-sized, deciduous tree with an upright habit and a narrow crown, becoming more rounded as it matures. Creamy-white flowers appear in spring, followed by masses of creamy-yellow berries, which mature to amber and persist through the winter. The leaves are similar to those of the common rowan, but turn fiery orange, red and purple in autumn, a lovely contrast to the berries. A healthy tree, though susceptible to fireblight. Like all ornamental rowans, Joseph Rock grows more shapely in full sun. Site: Tolerates exposureSoil: Any reasonably well drained soil, acid to neutral soils preferredPosition: Full sun or partial shadeSeason of Interest: Spring, autumn, early winterHardiness: HardyHeight: 26-40’ (8-12m) Spread: 13-26’ (4-8m)