• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases

Geum urbanum

wood avens

wood avens

© RHS

  • Other common names wood avens
    herb bennet

    blessed herb
    city avens
    clove root
    colewort
    Indian chocolate
    minarta
    St Benedict's herb
    star of the earth
    water flower

    see more
  • Family Rosaceae

  • Genus Geum are rhizomatous perennials, occasionally spreading by stolons, with a basal rosette of pinnately lobed leaves and saucer-shaped flowers in loose clusters

  • Details G. urbanum is a hairy perennial forming overwintering rosettes of leaves with five or three rounded lobes; the largest lobe at the tip. Flower stems nod before the flowers open. These are simple, yellow, strawberry-like flowers, 5-20mm across from May until late autumn. Fruits, held in spherical clusters, are burred with red hooks

  • Plant range Europe to Himalaya

Characteristics

  • Foliage Evergreen

  • Habit Bushy

  • Hardiness

    Hardiness ratings

    All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

    • H1a - Under glass all year (>15C)
    • H1b - Can be grown outside in the summer (10 - 15)
    • H1c - Can be grown outside in the summer (5 - 10)
    • H2 - Tolerant of low temperatures, but not surviving being frozen (1 to 5)
    • H3 - Hardy in coastal and relatively mild parts of the UK (-5 to 1)
    • H4 - Hardy through most of the UK (-10 to -5)
    • H5 - Hardy in most places throughout the UK even in severe winters (-15 to -10)
    • H6 - Hardy in all of UK and northern Europe (-20 to -15)
    • H7 - Hardy in the severest European continental climates (< -20)

    H7

Colour

Sunlight

  • Partial Shade

  • Aspect South-facing or North-facing or West-facing or East-facing

  • Exposure Exposed or Sheltered

Soil

  • Loam

    Loam

  • Chalk

    Chalk

  • Clay

    Clay

  • Sand

    Sand

  • MoistureWell-drained, Moist but well-drained

  • SoilLoam, Chalk, Clay, Sand

  • pHAcid, Alkaline, Neutral

Size

  • Ultimate height 0.5-1 metres

  • Ultimate spread 0.1-0.5 metres

  • Time to ultimate height 2-5 years

How to grow

Cultivation Occurs naturally on a wide range of soils from acid to calcareous in semi-shaded sites such as woods and hedgerows

Propagation Propagate by seed in autumn

Suggested planting locations and garden types Wildflower meadow Wildlife Gardens

How to care

Pruning None required

Pests Trouble free

Diseases Trouble free

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