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AGM plants have been through a rigorous trial and assessment programme. They are:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
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Other common names chittamwood American smokewood
Synonyms Rhus cotinoides Cotinus americanus
Family Anacardiaceae
Genus Cotinus are large deciduous shrubs or small trees with simple, obovate leaves often colouring well in autumn, and insignificant flowers borne in large, plumy panicles in summer becoming colourful in fruit
Details C. obovatus is a vigorous large deciduous shrub with large rounded leaves opening purplish-pink, later green; turning orange, red and purple in autumn. Flowers pinkish in a plume to 30cm in length
Plant range SE North America
Foliage Deciduous
Habit Bushy
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H6
Full Sun
Partial Shade
Aspect North-facing or West-facing or East-facing or South-facing
Exposure Exposed or Sheltered
Chalk
Clay
Loam
Sand
MoistureMoist but well-drained, Well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Ultimate height 4-8 metres
Ultimate spread 4-8 metres
Time to ultimate height 10-20 years
Cultivation Grow in well-drained soil in sun or partial shade
Propagation Propagate by semi-hardwood cuttings
Suggested planting locations and garden types Low Maintenance
Pruning Pruning group 1
Pests Generally pest free
Diseases Susceptible to verticillium wilt
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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.