Hibiscus Walberton's Rose Moon ('Walhirosmo'PBR)

RHS Plant Profile
hibiscus [Walberton's Rose Moon]

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Synonyms

Hibiscus 'Walhirosmo'PBR
Hibiscus Big Hibiskiss
Hibiscus Rose Moon

Shrubs
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This hibiscus will really earn its place in your garden due to its enormous, slightly flatter, flowers (up to 19cm diameter!) and a long flowering period from June sometimes right into autumn. The exotic flowers are bright pink with a red centre and are set against glossy, deep green leaves making this a lovely option for a sunny border

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

2.5-4 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
5–10 years
Max Spread
1.5-2.5 metres
Max Height
2.5-4 metres

Growing Conditions

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

Position

Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
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)
H5

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Malvaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Hibiscus can be deciduous or evergreen shrubs, trees, annuals or perennials, with simple or palmately lobed leaves and large, funnel-shaped flowers over a long flowering season
Name Status
Trade

How to Grow

Cultivation

May be grown outdoors in mild, frost-free areas, or in large containers that can be moved indoors over winter. Outdoors, grow in neutral to slightly acidic soil in full sun, and mulch well over winter. Hibiscus need long, hot summers to flower well. Indoors, grow in bright filtered light with moderate humidity and good ventilation

Propagation

Propagate by softwood cuttings in late spring, by semi-ripe cuttings in summer, or by layering in spring or autumn

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Coastal
  • Flower borders and beds
  • Wall side borders

Pruning

Very little pruning required, just prune away any broken or dead branches after flowering - pruning group 1

Pests

May be susceptible to aphids, scale insects, mealybugs and glasshouse whitefly when grown under glass

Diseases

May be susceptible to honey fungus (rarely) and powdery mildews