Hibiscus Moscheutes 'Blue River II'

Blue River II Rosemallow

Hibiscus moscheutos ‘Blue River II’ is a striking herbaceous perennial valued for its enormous white flowers and strong garden presence. It forms a tall, upright clump of lush green foliage that emerges late in spring. In mid to late summer, huge tropical-looking blooms—often 10–12 inches across—open in pure white with a soft pink to rose-colored eye, creating a dramatic focal point in the garden. The flowers attract pollinators and provide bold color through late summer.

Type: Perennial

Mature Size:
Width: 36–48 in
Height: 4–6 ft
(10-year size: forms large expanding clumps)

USDA Zones: 4a–9b
Form: Upright, bushy clump
Light: Full sun
Soil: Moist, fertile soils; tolerates clay and wet conditions
Water: Moderate to high; prefers consistent moisture

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


Features & Landscape Uses


Huge white flowers with soft pink eye



Tropical appearance in cold climates



Bold late-summer color



Ideal for borders, rain gardens, and specimen plantings




Care
Cut stems to the ground in late fall or early spring. Plants emerge late in spring, so mark their location in the garden. Provide rich soil and consistent moisture for best growth and flowering. Divide clumps every few years if needed to maintain vigor.

Plant type

Perennial

Height

6-8'

Width

36-48"

Hardiness zones

4–9

Sunlight

Full Sun

Growth rate

Fast

Bloom time

Early Fall, Late Summer

Flower color

White

Leaf color

Green

Fall color

Green

Attracts

Bees, Butterflies, Hummingbirds

Soil

Clay, Highly Adaptable, Humus rich, Well Drained

Landscape use

Accent Plant, Foundation Plant

Shape

Clump, Upright

Deer resistant

Yes

Drought tolerant

No