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Annual Biennial

Alcea rosea 'Halo Red' (Halo Series)
  • RHS Plants for pollinators

hollyhock 'Halo Red'

A short-lived bicoloured perennial with lobed rounded leaves and long, erect pyramids of open funnel-shaped bright red single flowers with a yellow halo in the centre in summer.

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Size
Ultimate height
1.5–2.5 metres
Time to ultimate height
1 year
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Loam
Sand
Moisture
Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Red Yellow Green
Autumn Green
Winter
Position
  • Full sun
Aspect

South–facing

Exposure
Exposed or Sheltered
Hardiness
H5
Botanical details
Family
Malvaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Columnar upright
Genus

Alcea are robust biennials or short-lived perennials with showy funnel-shaped flowers borne in tall, erect racemes in summer

Name status

Unresolved

How to grow

Cultivation

Thrives in well-drained, moderately fertile soil in full sun. May need support on exposed sites, see staking: perennials

Propagation

Propagate by seed, sown in gentle heat in midwinter, or in situ in spring

Suggested planting locations and garden types
  • Architectural
  • City and courtyard gardens
  • Cottage and informal garden
  • Low Maintenance
  • Wall side borders
Pruning

Cut back dead foliage after flowering, or pull out and discard - growing as annuals or biennials can help limit the spread of rust

Pests

May be susceptible to cutworms and slugs on young growth, and to capsid bugs, aphids and mallow flea beetles

Diseases

May be susceptible to hollyhock rust

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