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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 alder buckthorn black alder
Synonyms Rhamnus frangula
Family Rhamnaceae
Genus Frangula can be deciduous or evergreen shrubs or trees, with simple leaves that often colour well in autumn, and tiny yellowish flowers followed by red or black fruit
Details F. alnus is a bushy deciduous shrub with glossy rounded to ovate leaves which turn yellow or red in autumn, and clusters of small flowers in late spring and early summer, followed by bright red berries which ripen to black
Plant range Europe, Turkey, N Africa
Foliage Deciduous
Habit Bushy
Toxicity All parts may cause severe discomfort if ingested. Wear gloves and wash hands after handling
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H7
Full Sun
Partial Shade
Aspect West-facing or East-facing or South-facing or North-facing
Exposure Exposed or Sheltered
Chalk
Clay
Loam
Sand
MoistureMoist but well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Ultimate height 2.5-4 metres
Ultimate spread 2.5-4 metres
Time to ultimate height 20-50 years
Cultivation Flowers are attractive to bees. Suitable for hedging, wild or woodland gardens. Grow in moist soils
Propagation Propagate by seed or semi-hardwood cuttings
Suggested planting locations and garden types Low Maintenance Wildlife Gardens Wildflower meadow
Pruning Pruning group 1
Pests Generally pest free
Diseases Generally disease free
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