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Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
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Other common names
snowball snowball tree
red snowball tree red guelder rose rose elder Whitsuntide boss
Viburnum opulus 'Sterile'
Viburnum can be deciduous or evergreen shrubs with opposite, simple or palmately lobed leaves and clusters of small, often fragrant white or pink flowers, followed by red, blue or black berries
Adoxaceae / Adoxaceae
'Roseum' is a large, bushy deciduous shrub with 3- to 5-lobed leaves turning reddish in autumn. Creamy-white sterile flowers in dense rounded clusters to 6cm in width. No fruit
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
While we update our systems with the new hardiness ratings you may still see old hardiness ratings in your search results. These are denoted as 'Old'.
For full details of the hardiness ratings see
Aspect North-facing or East-facing or South-facing or West-facing
Exposure Sheltered or Exposed
MoistureWell-drained, Moist but well-drained
SoilClay, Loam, Sand, Chalk
pHAcid, Alkaline, Neutral
Grows well in most moderately fertile, humus-rich, well-drained soils
Propagate by softwood and semi-hardwood cuttings
Suggested planting locations and garden types
Hedging & Screens Low Maintenance
Pruning group 8. Tolerates hard renovative pruning
Aphids and viburnum beetle may be a problem
May be affected by a leaf spot
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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