Crocosmia masoniorum 'Rowallane Orange'

RHS Plant Profile
giant montbretia 'Rowallane Orange

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giant montbretia 'Rowallane Orange RHS
Herbaceous Perennial
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A robust clump-forming perennial with long, sword-shaped, pleated green leaves. Produces tall, arching spikes of upward-facing, orange-red flowers from mid to late summer

Position

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
2–5 years
Max Spread
0.5-1 metres
Max Height
1-1.5 metres

Growing Conditions

Chalk Clay Loam Sand
Moisture
Moist but 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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Iridaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Crocosmia are deciduous cormous perennials with erect, sword-shaped leaves and branched spikes of showy, funnel-shaped flowers in summer
Name Status
Accepted

How to Grow

Cultivation

Plant 8 to 10cm deep in moderately fertile, humus-rich soil. Mulch well in areas prone to frost. Lift and divide congested clumps to maintain vigour. Has the potential to become a nuisance in some gardens if not managed well

Propagation

Propagate by division in spring just before growth starts

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Banks and slopes
  • Flower borders and beds

Pruning

No pruning required. Remove dead leaves and flower stems before new growth starts in spring

Pests

May be susceptible to red spider mite

Diseases

Generally disease-free