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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 Turkey oak bitter oak
iron oak manna oak mossy-cupped oak wainscot oak
Family Fagaceae
Genus Quercus can be deciduous or evergreen trees or shrubs, with entire, lobed or toothed leaves; flowers inconspicuous, followed by characteristic acorns; sometimes good autumn colour
Details Q. cerris is a fast-growing, spreading, deciduous, very variable tree to 30m. The narrow, dark green leaves typically have deep, pointed lobes, the acorns are up to 4cm long, and the cups covered in shaggy scales
Plant range S Europe, SW Asia
Foliage Deciduous
Habit Spreading / Branched
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 South-facing or North-facing or West-facing or East-facing
Exposure Exposed or Sheltered
Chalk
Clay
Loam
Sand
MoistureMoist but well-drained, Well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Ultimate height Higher than 12 metres
Ultimate spread wider than 8 metres
Time to ultimate height 20-50 years
Cultivation Grows well in most deep, fertile soils
Propagation Propagate by seed, sown as soon as ripe, in a cold frame
Suggested planting locations and garden types Low Maintenance Coastal
Pruning Pruning group 1
Pests Susceptible to aphids, caterpillars, leaf-mining moths and oak gall wasps
Diseases May be affected by powdery mildews
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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.