Geranium maderense

RHS Plant Profile
giant herb robert
giant herb robert Janet Cubey & Wolfgang Bopp 2000
Award of Garden MeritPlants for pollinators
Herbaceous Perennial Conservatory Greenhouse

A robust but short-lived evergreen perennial or biennial to 1.5m, with attractively dissected leaves to 20cm in length and large panicles of purplish-pink flowers 4cm across, with darker centres

Position

Full shade, Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1-1.5 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
1–2 years
Max Spread
0.5-1 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Well–drained
pH
Acid or Alkaline or Neutral

Position

Full shade Full sun Partial shade
Aspect
East–facing or South–facing or North–facing or West–facing
Exposure
Exposed or Sheltered
Hardiness
H3

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Geraniaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Tufted
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
Name Status
Correct
Plant Range
Madeira

How to Grow

Cultivation

Grow outdoors in well-drained soil in either sun or shade in frost-free area. Grow under glass in peat-free, loam-based compost with added sharp sand in bright filtered light. Remove flowered stems and old leaves to encourage the production of new leaves and flowers

Propagation

Propagate by seed, division or take basal cuttings

Suggested planting locations and garden types

  • Cottage and informal garden
  • Mediterranean climate plants
  • City and courtyard gardens
  • Coastal
  • Wildlife gardens
  • Flower borders and beds
  • Conservatory and greenhouse

Pruning

No pruning required

Pests

Generally pest-free

Diseases

May be susceptible to downy mildews and powdery mildews