Chrysanthemum 'Isabellarosa' (21d)

RHS Plant Profile
chrysanthemum 'Isabellarosa'

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Synonyms

Dendranthema 'Isabellrosa'

Award of Garden Merit
Herbaceous Perennial

Clump-forming, bushy perennial about 60cm tall, with mid-green leaves, and bearing single pale peach-pink flowerheads to 5cm across, with bright yellow disk centres, in late autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

Time to Maturity
2–5 years
Max Spread
0.5-1 metres
Max Height
0.5-1 metres

Growing Conditions

Chalk Loam Sand
Moisture
Well–drained
pH
Alkaline 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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Asteraceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Potentially harmful
Skin allergen. Wear gloves and other protective equipment when handling
Genus
Chrysanthemum are erect woody-based perennials with aromatic, pinnately lobed leaves and flowerheads of diverse form, from late summer to late autumn
Name Status
Unresolved
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea

Single Korean chrysanthemums are perennials with lobed leaves and single flowerheads

How to Grow

Cultivation

Does best in a well-drained, moderately-fertile soil in full sun. Pinch out the growing tip when the plants are 15-20cm tall to encourage free-flowering, bushy plants. See chrysanthemum cultivation for further information

Propagation

Propagate by division or basal stem cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Flower borders and beds
  • Garden edging
  • Cut flowers

Pruning

Cut down flowered stems to 10cm after flowering

Pests

May be susceptible to chrysanthemum leaf miner, aphids, earwigs, eelworm and capsid bug

Diseases

May be susceptible to grey moulds (Botrytis), powdery mildews and chrysanthemum white rust