Begonia annulata 'Karma Khonoma'

RHS Plant Profile
leaf-ring begonia 'Karma Khonoma'

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Herbaceous Perennial Conservatory Greenhouse Houseplants
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A rhizomatous perennial, to around 30cm high, with an upright habit and asymmetric, bicoloured leaves with dark greenish-bronze centres and margins, and a broad band of light green with white spots in between. Loose clusters of white flowers are produced in summer

Position

Partial shade

Soil Types

Loam

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

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

Position

Partial shade
Aspect
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)
H1B

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Begoniaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Bushy
Genus
Begonia can be annuals, evergreen or deciduous perennials or shrubs, with fibrous, tuberous or rhizomatous roots and usually asymmetrical leaves, often strikingly patterned, and small or large flowers, both male and female in the same cluster
Name Status
Unresolved

How to Grow

Cultivation

Grow under glass or overwinter indoors. Thrives in fertile, well-drained, neutral to slightly acidic loam, with protection from hot afternoon sun. Water moderately in growth, and sparingly in winter; will not tolerate waterlogging. Pot on annually in spring. For more advice see begonias: houseplants

Propagation

Propagate by basal softwood cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Houseplants
  • Patio and container plants
  • Bedding
  • Conservatory and greenhouse

Pruning

No pruning required

Pests

May be susceptible to caterpillars, mealybugs, mites, thrips, vine weevil and aphids

Diseases

May be susceptible to grey moulds (botrytis), powdery mildews and stem rot