Hibiscus syriacus 'Collie Mullens

Collie Mullins Rose Of Sharon

Hibiscus syriacus ‘Collie Mullens’ is a decorative deciduous flowering shrub valued for its large, fully double blossoms and extended summer bloom period. It develops an upright, vase-shaped habit with attractive green foliage that provides a dense backdrop throughout the growing season. From mid-summer into early fall, large double flowers appear in soft pink tones with deeper pink highlights, creating a full, ruffled appearance that adds elegance and color to the landscape.

Type: Deciduous shrub

Mature Size:
Width: 6–8 ft
Height: 8–10 ft
(10-year size: typically 6–8 ft tall)

USDA Zones: 5a–9b
Form: Upright, vase-shaped shrub
Light: Full sun
Soil: Average, well-drained soils; tolerant of clay and urban conditions
Water: Moderate; drought tolerant once established

Wildlife: Attracts bees, butterflies, and hummingbirds; deer moderately resistant


Features & Landscape Uses


Fully double pink flowers with ruffled form



Long bloom period from mid-summer to fall



Attractive upright shrub habit



Ideal for hedges, screens, and specimen plantings




Care
Prune in late winter or early spring since flowers form on new wood. Remove unwanted seedlings if naturalizing is not desired. Adaptable and tolerant of heat, humidity, and urban conditions once established.

Plant type

Deciduous Shrub, Flowering Deciduous Shrub

Height

8-10'

Width

6-8'

Hardiness zones

5–9

Sunlight

Full Sun

Growth rate

Fast

Bloom time

Early Fall, Fall, Late Summer, Summer

Flower color

Pink

Leaf color

Green

Fall color

Yellow Green

Attracts

Butterflies, Hummingbirds

Soil

Highly Adaptable, Humus rich, Well Drained

Landscape use

Foundation, Hedge, Mass Planting, Privacy Screen

Shape

Clumping, Vase Shaped

Bark

Smooth

Fruit

Yes

Fragrant

Yes

Deer resistant

Yes

Drought tolerant

No