Hibiscus cannabinus

RHS Plant Profile
Ambari hemp

Other common names

bimli, bimlipatum jute, Deccan hemp, hemp mallow, Indian brown hemp, kenaf

Annual Biennial Herbaceous Perennial

Fast-growing, upright, almost unbranched annual or short-lived, woody-based perennial about 3.5m tall, with fine, spiny-stems bearing long-stalked dark green leaves, the upper leaves palmately lobed and those lower down on the stem unlobed. Funnel-shaped, pale yellow, occasionally purple-red flowers with crimson-red centres, produced singley or in racemes from summer to autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

2.5-4 metres

Max Spread

1-1.5 metres

Size

Time to Maturity
2–5 years
Max Spread
1-1.5 metres
Max Height
2.5-4 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Acid or Neutral

Position

Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered
Hardiness
H2

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Malvaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Columnar upright
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
Correct

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 seed (sown indoors) in spring, or propagate by division in spring

Suggested planting locations and garden types

  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Sub-tropical
  • Bedding
  • Conservatory and greenhouse
  • Flower borders and beds

Pruning

Pruning group 1 if necessary, no pruning need if grown as an annual

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