Botanical Name: Hibiscus syriacus 'Oiseau Blue'
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Common Name: Olseau Blue Rose-of-Sharon  
Plant photo of: Hibiscus syriacus 'Oiseau Blue'
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Water Saving Tip:

Change spray sprinklers to low-flow bubbler or drip systems. Shrubs and trees are ideal candidates for this type of irrigation because the water is applied directly to the root zones.

  • Anatomy

  • Culture

  • Design

Plant Type

Shrub

 

Height Range

6-12'

 

Flower Color

Lavender, Red, Violet

 

Flower Season

Summer

 

Leaf Color

Green, Dark Green

 

Bark Color

Brown, Grey

 

Fruit Color

Brown

 

Fruit Season

Summer, Fall

Sun

Full, Half

 

Water

Medium

 

Growth Rate

Moderate

 

Soil Type

Sandy, Clay, Loam, Rocky, Unparticular

 

Soil Condition

Average, Rich, Poor, Well-drained, Moist

 

Soil pH

Acid, Neutral, Basic

 

Adverse Factors

n/a

Design Styles

English Cottage, Meadow, Mediterranean, Ranch, Spanish

 

Accenting Features

Showy Flowers

 

Seasonal Interest

Summer

 

Location Uses

Background, Perennial Border, Shrub Border, Foundation, Patio, Walls / Fences

 

Special Uses

Hedge, Screen, Small Spaces

 

Attracts Wildlife

n/a

Information by: Stephanie Duer
Photographer:

  • Description

  • Notes

Rose-of-Sharon is a deciduous shrub with an upright, dense form in its youth, becoming more open and spreading with age. 'Oiseau Blue' has large, single-petaled flowers of violet blue with a red eye. Foliage is bright green and unevenly serrated. Rose-of-Sharon makes an excellent addition to the shrub border, or as a hedge or screen. Moderate grower to 10 feet tall and 6 feet wide.
Rose of Sharon prefers full sun but will grow and flower with half day sun. Requires well drained soil, and grows better in poorer soils than those that are very loamy. Is sometimes available as a standard, meaning that it has been pruned to be in tree form; will require pruning to maintain tree form. Otherwise, prune selectively to control size and form; see Guides.