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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 knotted cranesbill
Family Geraniaceae
Genus Geranium can be annuals, biennials and perennials, herbaceous or evergreen, with rounded, usually palmately lobed or divided leaves, and lax inflorescences of rounded, 5-petalled flowers
Details G. nodosum is a sprawling perennial with glossy 3-lobed leaves and loose clusters of dark-veined, light pink flowers 2.5cm wide from late spring to early autumn
Plant range S Europe
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
H5
Full Shade
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 0.1-0.5 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 2-5 years
Cultivation Grow in any, moderately fertile soil apart from waterlogged soils. Full sun or partial shade is best but shade is tolerated
Propagation Propagate by division in spring or propagate by basal cuttings in early to mid spring and root with bottom heat
Suggested planting locations and garden types Flower borders and beds Banks and Slopes Ground Cover Coastal Cottage & Informal Garden
Pruning Remove flowered stems and old leaves to encourage the production of fresh leaves and flowers
Pests May be attacked by vine weevil, geranium sawfly, slugs and snails
Diseases May be subject to powdery mildews, a downy mildew and a virus
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
knotted cranesbill
Buy from £7.99 at the RHS Plants Shop
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