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Tree
Bushy
old H4 (hardy)
White in Spring
Green in Spring and SummerOrange, Purple and Red in Autumn
Yellow in Autumn
8-12 metres
4-8 metres
20-50 years
mountain ash 'Joseph Rock'
Rosaceae
Sorbus can be deciduous trees or shrubs with simple or pinnate leaves and clusters of small white or pink flowers, followed by white, yellow, pink, red or brown berries; some have fine autumn colour
'Joseph Rock' is an upright tree with pinnate leaves which turn orange, red and purple in autumn, contrasting with the butter-yellow berries
Suppliers listed in RHS Plant Finder
Grow in moderately fertile, humus-rich soil. Tolerant of atmospheric pollution; ideal specimen tree in small garden
Propagate by softwood cuttings in early summer or budding in summer or grafting in winter. Propagate by seed sown outdoors in autumn
Low Maintenance
Pruning group 1
May be attacked by aphids, blister mites and sawflies
May be affected by apple canker and fireblight
© The Royal Horticultural Society 2011 / RHS Registered Charity № 222879/SC038262