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Hibiscus syriacus 'Oiseau Bleu'

Hibiscus syriacus 'Oiseau Bleu' – Rose of Sharon 'Oiseau Bleu'

Hibiscus syriacus 'Oiseau Bleu' – Rose of Sharon 'Oiseau Bleu'

Format

Exposure

  • Sun

Rusticity

5, 6, 7, 8, 9

Bloom time

  • July
  • August
  • September

  • Striking sky blue large flowers
  • Vibrant bloom continuing into fall
  • Attracts hummingbirds and butterflies
  • Upright structure ideal as specimen
  • Excellent summer heat tolerance

Indulge in the presence of the 'Oiseau Bleu' Rose of Sharon. This dramatic shrub infuses an exotic touch into the garden by unfurling majestic sky-blue flowers enhanced by a captivating deep purple center. Its generous blooms illuminate the landscape from mid-summer through fall, attracting hummingbirds and butterflies. Adopt this exceptional plant to structure your garden designs with elegance and brilliance.

Characteristics

  • Foliage : Deciduous, deeply lobed leaves of a vibrant, attractive green appearing in late spring.
  • Flowering : Large, single violet-blue flowers with a dark purple heart, continuously renewing from July through September.
  • Light Requirement : Requires full sun exposure to achieve maximum bloom.
  • Habit : Bushy shrub habit, naturally upright and well-branched.
  • Growth : Medium growth rate, reaching 2 to 3 meters at maturity.
  • Soil : Thrives in rich, moist, well-drained soil while adapting to various soil conditions.
  • Temperature : Hardiness zone 5.
  • Resistances : Tolerates summer heat and urban pollution well once established.

Use

  • Types of Use : Integrate this shrub into borders, informal flowering hedges, as a specimen plant, or in large containers on sunny patios.
  • Decorative Benefits : Delivers a rare sky-blue color and brings a striking vertical presence late in the season.

Maintenance

  • Watering : Water regularly during the first year following planting. Maintain slightly moist soil during summer dry spells.
  • Fertilization : Apply a balanced fertilizer in early spring to stimulate growth and flower bud formation.
  • Pruning : Prune early in spring before growth starts to maintain a compact habit and encourage new wood that bears flowers.
  • Planting : Plant in a hole twice as wide as the root ball, amending the soil with compost to ensure optimal rooting.
  • Winter Protection : Apply a generous layer of mulch at the base and shelter young plants from prevailing winds during the first few winters.

(syn. Hibiscus syriacus 'Blue Bird')

Plant details

Dimensions

Spacing
38 - 79 in.
Spread
47 - 71 in.
Height
79 - 118 in.

Characteristics

Habit:

  • Columnar

Flowering colours:

  • Blue

Plant needs

Watering:

  • Moderate

Maintenance:

  • Winter protection
  • Prune spring
  • Cut back in spring

Soil requirement:

  • Rich
  • Fresh
  • Moist

Features

Resistance:

  • Heat
  • Cold
  • Disease

Attract:

  • Hummingbirds
  • Butterflies
  • Pollinators

Use:

  • Container
  • Border
  • Hedge
  • Specimen
  • Flower bed
  • In-ground
  • Container feature

Attribute:

  • Spectacular flowers
  • Cut flower
  • Long flowering

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