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HIBISCUS syriacus 'Rubis'

Image of Hibiscus syriacus 'Rubis'

Jesse Saylor

Family

Malvaceae

Botanical Name

HIBISCUS syriacus 'Rubis'

Plant Common Name

Rose-of-Sharon, Rubis Rose-of-Sharon

General Description

Long grown for its showy saucer-shaped summer flowers, rose-of-Sharon is a large upright deciduous shrub from eastern Asia. The antique cultivar 'Rubis' bears rose-red, maroon-eyed blooms for many weeks from midsummer to early fall, attracting hummingbirds, butterflies, and bees. The flowers are followed by capsule-like fruits, whose seeds often give rise to self-sown seedlings. The lustrous lobed leaves of medium green appear in mid-spring, later than those of most other deciduous plants. They do not color in fall.

This easily grown shrub thrives in full sun to light shade and fertile well-drained soil. It is quite cold hardy once established, but may be damaged by severe cold when young. It works well in the mixed border, as a hedge or screen, or as an individual specimen. Watch for seedlings, which will not be true to name.

Characteristics

  • AHS Heat Zone

    9 - 1

  • USDA Hardiness Zone

    5 - 9

  • Sunset Zone

    H1, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type

    Shrub

  • Sun Exposure

    Full Sun, Partial Sun

  • Height

    8'-12' / 2.4m - 3.7m

  • Width

    6'-12' / 1.8m - 3.7m

  • Bloom Time

    Summer, Late Summer, Early Fall, Fall

  • Native To

    Eastern Asia

Growing Conditions

  • Soil pH

    Acidic, Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam

  • Growth Rate

    Fast

  • Water Requirements

    Average Water

  • Habit

    Oval/Rounded

  • Seasonal Interest

    Summer, Fall

Ornamental Features

  • Flower Interest

    Showy

  • Flower Color

    Red, Rose

  • Fruit Color

    Brown, Sandy Brown

  • Foliage Color (Spring)

    Green

  • Foliage Color (Summer)

    Green

  • Foliage Color (Fall)

    Green, Yellow Green

  • Bark Color

    Tan, Gray

  • Fragrant Flowers

    No

  • Fragrant Fruit

    No

  • Fragrant Foliage

    No

  • Bark or Stem Fragrant

    No

  • Flower Petal Number

    Single

  • Repeat Bloomer

    Yes

  • Showy Fruit

    No

  • Edible Fruit

    No

  • Showy Foliage

    No

  • Foliage Texture

    Medium

  • Foliage Sheen

    Glossy

  • Evergreen

    No

  • Showy Bark

    No

Special Characteristics

  • Bark Texture

    Smooth

  • Usage

    Feature Plant, Foundation, Hedges, Mixed Border, Screening / Wind Break

  • Sharp or Has Thorns

    No

  • Invasive

    Sometimes

  • Attracts

    Hummingbirds, Butterflies

  • Self-Sowing

    Yes