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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 paniculate hydrangea
Synonyms Hydrangea 'Pee Gee'
Family Hydrangeaceae
Genus Hydrangea can be deciduous or evergreen shrubs, or self-clinging climbers, with flowers in clusters usually comprising both small fertile and more showy sterile flowers; often good autumn colour
Details H. paniculata is a deciduous woody plant with toothed, mid to dark green leaves in opposite pairs or clusters of 3, and flowerheads in large, conical panicles, produced in late summer and early autumn, made up of showy, pinkish-white sterile flowers scattered amongst the smaller creamy-white fertile flowers
Plant range E Asia
Foliage Deciduous
Habit Bushy
Toxicity May cause mild stomach upset if ingested, contact with foliage may aggravate skin allergies
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H5
Full Sun
Partial Shade
Aspect North-facing or West-facing or South-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 2.5-4 metres
Ultimate spread 1.5-2.5 metres
Time to ultimate height 5-10 years
Cultivation Grow in fertile, humus-rich, moist but well-drained soil in full sun or partial shade with shelter from cold drying winds
Propagation Propagate by seed in containers in a cold frame in spring; propagate by softwood cuttings in early summer or hardwood cuttings in winter
Suggested planting locations and garden types Flower borders and beds Wall-side Borders City & Courtyard Gardens Coastal Cottage & Informal Garden
Pruning Pruning group 1 or Pruning group 6
Pests Aphids, capsid bug, vine weevil and hydrangea scale may be a problem
Diseases May be subject to a leaf spot, powdery mildew, grey moulds (Botrytis) and honey fungus
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