Rose of Sharon, Shrub Althea 'Diana'

Hibiscus syriacus

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: syriacus (seer-ee-AK-us) (Info)
Cultivar: Diana
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8-10 ft. (2.4-3 m)


4-6 ft. (1.2-1.8 m)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade

Bloom Color:

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall



Other details:

May be a noxious weed or invasive

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

From woody stem cuttings

From softwood cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

Direct sow as soon as the ground can be worked

From seed; sow indoors before last frost

From seed; direct sow after last frost

From seed; germinate in a damp paper towel

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:

Tuscaloosa, Alabama

Alachua, Florida

Jacksonville, Florida

Atlanta, Georgia

Krotz Springs, Louisiana

Norco, Louisiana

Fallston, Maryland

East Longmeadow, Massachusetts

Hubbardston, Massachusetts

Winston Salem, North Carolina

Cleveland, Ohio

Hulbert, Oklahoma

Lansdowne, Pennsylvania

Shippensburg, Pennsylvania

Quinlan, Texas

Rosenberg, Texas

Portsmouth, Virginia

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Gardeners' Notes:


On Jun 2, 2013, ktarisaema from Lansdowne, PA (Zone 7a) wrote:

Please note that the remark in the listing "may be invasive" does not apply to cultivar 'Diana' which is a sterile clone.After 25 yrs in my garden not one single seedling proves it. You may wish to correct the listing. OTHER Hibiscus syriacus can be invasive however not 'Diana'.


On Aug 13, 2010, AmyMorie from Green Cove Springs, FL (Zone 9a) wrote:

Wonderful large luminous blooms! Seems to have a few volunteers here in N Florida, but not excessive by any means - estimate 1 successful seedling a year


On Aug 5, 2007, girlgroupgirl wrote:

I love this Rose of Sharon! Diana is a luminous and has single flowered pure white blossoms. Mine is trimmed into a little standard, and if the japanese beetles don't shred the flowers (they love them as much as I do) then it is pristine. Drought tolerant, loves sun, and it has never seeded around on me, not once!

What more could you ask?