Sorbus aucuparia Joseph Rock is a pretty and delicate looking Mountain Ash that has won both the First Class Certificate and the RHS Award of Merit in 1950. This Mountain Ash has small, narrow dark green compound leaves that turn a flame red in the autumn time. The creamy white flowers hang in clusters, appearing around May-June. These are followed by interestingly creamy yellow berries, whose colour contrasts fantastically with the bright red autumn colour. Rowan Joseph Rock will tolerate most soil types and will provide interest all year round.