Sorbus 'Eastern Promise'The Sorbus Eastern Promise is deciduous tree more commonly known as the Mountain Ash Eastern Promise. This variety has light green pinnate leaves that turn orange red in the Autumn. Small white flowers appear in the Spring followed by pink berries in Autumn. The Sorbus Eastern Promise has a bushy habit; this variety is hardy and will thrive in most soil types. The Mountain Ash Eastern Promise is best planted in a full sun or partially shaded location.