Hibiscus syriacus ‘Diana’

  • Attributes: Genus: Hibiscus Species: syriacus Family: Malvaceae Life Cycle: Woody Recommended Propagation Strategy: Stem Cutting Wildlife Value: Members of the genus Hibiscus support the following specialized bee: Ptilothrix bombiformis. This plant is mildly resistant to damage by deer. Particularly Resistant To (Insects/Diseases/Other Problems): Black Walnut Dimensions: Height: 5 ft. 0 in. – 8 ft. 0 in. Width: 4 ft. 0 in. – 6 ft. 0 in.
  • Whole Plant Traits: Plant Type: Shrub Leaf Characteristics: Deciduous Habit/Form: Multi-stemmed Vase Growth Rate: Medium Maintenance: Low Texture: Coarse
  • Cultural Conditions: Light: Full sun (6 or more hours of direct sunlight a day) Partial Shade (Direct sunlight only part of the day, 2-6 hours) Soil Texture: Clay High Organic Matter Loam (Silt) Soil Drainage: Good Drainage Usda Plant Hardiness Zone: 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
  • Flowers: Flower Color: White Flower Value To Gardener: Showy Flower Bloom Time: Summer Flower Shape: Tubular Flower Petals: 4-5 petals/rays Flower Size: 1-3 inches Flower Description: Hollyhock-like, 5-petaled
  • Leaves: Leaf Characteristics: Deciduous Leaf Color: Green Leaf Feel: Leathery Leaf Type: Compound (Pinnately , Bipinnately, Palmately) Leaf Arrangement: Alternate Leaf Shape: Rhomboidal Leaf Margin: Dentate Hairs Present: No Leaf Length: 3-6 inches Leaf Width: 1-3 inches Leaf Description: Medium green, glossy
  • Stem: Stem Is Aromatic: No
  • Landscape: Landscape Location: Naturalized Area Landscape Theme: Butterfly Garden Drought Tolerant Garden Design Feature: Hedge Screen/Privacy Attracts: Pollinators Specialized Bees Resistance To Challenges: Deer Drought Wet Soil

Rose of Sharon, Shrub Althea ‘Diana’


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

Richmond, Texas

Rosenberg, Texas

Portsmouth, Virginia

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