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Hibiscus syriacus ‘Diana’ (Rose of Sharon)

Rose of Sharon 'Diana', Shrub Althea 'Diana'

AGM Award
Hibiscus syriacus 'Diana', Rose of Sharon 'Diana', Shrub Althea 'Diana', Flowering Shrub, White flowers, White Hibiscus

Noted for its prolific flower production and long blooming season, award-winning Hibiscus syriacus ‘Diana’ (Rose of Sharon) is a bushy deciduous shrub with elegant, saucer-shaped, pure white flowers, up to 5 in. across (12 cm), with slightly wavy petal edges. Unlike most hardy Hibiscus, they remain open into the evening. Blooming continuously from midsummer to frost, each flower lasts about one day. They stand out against the green foliage of broadly ovate leaves that turns golden-yellow in fall. A hardy, versatile and undemanding shrub, lasting for years without much effort, and ideal to brighten any garden.

  • Recipient of the prestigious Award of Garden Merit of the Royal Horticultural Society, Gold Medal of the Pennsylvania Horticultural Society.
  • Typically grows with a rounded habit to 4-10 ft. tall (120-300 cm) with a spread of 3-6 ft. (90-180 cm). This variety does not readily re-seed itself.
  • A full sun lover, this plant is best grown in average, medium moisture, well-drained soils. Tolerates part shade. Prefers moist, organically rich soils, but tolerates poor soils. Tolerant to drought, salt, heat, and humidity.
  • Fairly pest and disease free. Watch for aphids, mealybugs, and thrips. Deer resistant.
  • Plant in shrub borders for dramatic summer blooms. Great flowering shrub for foundation plantings, hedges or screens.
  • Prune to shape in spring. Pruning back to 2-3 buds in late winter may produce bigger blooms.
  • Propagate by semi-hardwood cuttings

Rose of Sharon: How to Grow and Care with Success


Rose of Sharon, also known as Hibiscus syriacus, is a deciduous shrub that produces showy, hollyhock-like flowers in shades of pink, purple, blue, and white. It is native to Asia and is popular for its late summer blooming season, drought tolerance, and low maintenance.

Requirements

Hardiness 5 - 9
Heat Zones 1 - 8
Climate Zones 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, H1
Plant Type Shrubs
Plant Family Malvaceae
Genus Hibiscus
Common names Rose of Sharon, Shrub Althea
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Fall
Height 4' - 10'
(120cm - 3m)
Spread 3' - 6'
(90cm - 180cm)
Spacing 72" - 84"
(180cm - 210cm)
Maintenance Low
Water Needs Low, Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Plant of Merit, Showy
Tolerance Drought, Deer, Salt
Attracts Butterflies, Hummingbirds
Garden Uses Banks And Slopes, Beds And Borders, Hedges And Screens
Garden Styles Informal and Cottage, Coastal Garden, City and Courtyard
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Alternative Plants to Consider

Hibiscus rosa-sinensis ‘Painted Lady’ (Tropical Hibiscus)
Hibiscus rosa-sinensis ‘Fifth Dimension’ (Tropical Hibiscus)
Hibiscus rosa-sinensis ‘Cooperi’ (Tropical Hibiscus)
Hibiscus rosa-sinensis ‘Hula Girl’ (Tropical Hibiscus)
Hibiscus ‘Kopper King’ (Rose Mallow)
Hibiscus ‘Lord Baltimore’ (Rose Mallow)

Recommended Companion Plants

Pittosporum tobira ‘Nanum’ (Mock Orange)
Atriplex hortensis var. rubra (Red Mountain Spinach)
Rosa ‘Iceberg’ (Floribunda Rose)
Molinia caerulea subsp. arundinacea (Moor Grass)

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Hardy Hibiscus: How to Plant, Grow and Care
Hardy US Native Hibiscus to Grow
Tropical Hibiscus
Rose of Sharon: How to Grow and Care with Success
Native Plant Alternatives to Hibiscus syriacus (Rose of Sharon)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 5 - 9
Heat Zones 1 - 8
Climate Zones 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, H1
Plant Type Shrubs
Plant Family Malvaceae
Genus Hibiscus
Common names Rose of Sharon, Shrub Althea
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Fall
Height 4' - 10'
(120cm - 3m)
Spread 3' - 6'
(90cm - 180cm)
Spacing 72" - 84"
(180cm - 210cm)
Maintenance Low
Water Needs Low, Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Well-Drained
Characteristics Plant of Merit, Showy
Tolerance Drought, Deer, Salt
Attracts Butterflies, Hummingbirds
Garden Uses Banks And Slopes, Beds And Borders, Hedges And Screens
Garden Styles Informal and Cottage, Coastal Garden, City and Courtyard
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Hibiscus
Guides with
Hibiscus
Not sure which Hibiscus to pick?
Compare Now

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