Geum 'Tosai'

RHS Plant Profile
avens 'Tosai'

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Herbaceous Perennial
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A compact, clump-forming perennial to around 40cm high forming a mound of mid-green, hairy, lobed leaves and bearing single, bright orange to orange-red flowers on upright stems from late spring into early summer

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand
Moisture
Moist but well–drained or Well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Exposed or Sheltered
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 & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Rosaceae
Native to GB/Ireland
No
Foliage
Deciduous, Semi evergreen
Habit
Clump forming
Genus
Geum are rhizomatous perennials, occasionally spreading by stolons, with a basal rosette of pinnately lobed leaves and saucer-shaped flowers in loose clusters
Name Status
Unresolved

How to Grow

Cultivation

Grows best in a moist but well-drained soil, rich in organic matter, in sun or even a certain amount of shade. Divide every few years to avoid congestion

Propagation

Propagate by division in spring or autumn

Suggested planting locations and garden types

  • Cottage and informal garden
  • Patio and container plants
  • Rock garden
  • Wildlife gardens
  • Flower borders and beds
  • Underplanting of roses and shrubs

Pruning

deadhead to promote more blooms, and cut back old stems after flowering

Pests

May be susceptible to leaf miners, aphids and geum sawfly larvae

Diseases

May be susceptible to Powdery mildews