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Hibiscus syriacus

Tree hollyhock

Garden

Wishlist

  • Hibiscus syriacus | Copyright Greenplantswap 2019

Features

  • BloomsAugust to October
  • Height1.75m to 3m
  • Spread1m to 2m
  • Growth HabitIrregular bushy
  • Flower ColourWhite to pink to blue-purple, red
  • Leaf ColourGlossy dark green

Description

Hibiscus syriacus (Tree hollyhock). This is a deciduous species which is grown for its large showy flowers that will bloom in a variety of colours; either pink, red, dark blue or white with red centres. The leaves are deep green and glossy, and they will need plenty of moisture in the growing season and a rich soil. Full sun is best. You can prune these shrubs in the spring, tip-pruning for the younger plants and a harder pruning for the older ones so they will maintain their good shape and bloom production. You should deadhead faded blooms in the flowering season or the flower size will diminish. These will self-sow readily. Newer hybrids of this plant are available with interesting colours and fewer seed pods.

Characteristics

Annual or Perennial, Deciduous, Fragrant

Other common names

Rose of Sharon

Origin

China to India

Interest and use

Ornamental, border, hedging, dried arrangements Summer/Autumn interest. Attracts humming birds in suitable geographical locations.

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  • Hibiscus syriacus | Copyright Greenplantswap 2019

Needs

  • LightFull sun
  • HardinessFully hardy (min -15°C)
  • SoilClay, Heavy, Well drained, Light, Medium
  • Soil pH7.0 to 9.0
  • WaterSemi-moist

Cultivation

Tip prune young plants to promote bushiness and cut back old plants hard in spring, if required.

Propagation

Seed in spring, shrubs and trees by greenwood cuttings in late spring or by semi-ripe cuttings in summer, perennials by division in autumn or spring.

Pests, diseases or disorders

Whitefly, scale insects, aphids and mildew may cause problems.

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