Hardy Hibiscus, Rose Mallow, Swamp Mallow 'Mighty Big Pink'

Hibiscus moscheutos

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: moscheutos (mos-KEW-tos) (Info)
Cultivar: Mighty Big Pink
Hybridized by B. Morrison
» View all varieties of Hibiscus


4-6 ft. (1.2-1.8 m)


24-36 in. (60-90 cm)


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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Full Sun

Bloom Color:


Bloom Time:

Mid Summer

Late Summer/Early Fall



Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

By dividing the rootball

From seed; direct sow outdoors in fall

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

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

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:

Requires consistently moist soil; do not let dry out between waterings

Where to Grow:

Unknown - Tell us


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

Blissfield, Michigan

Saint Paul, Minnesota

West Chester, Pennsylvania

Branchville, South Carolina

Gardeners' Notes:


On May 27, 2009, kastrol from West Chester, PA (Zone 6b) wrote:

I received this Hibiscus 3 years ago as a division from a friend. When I planted it I added in some good bag soil and mixed it with my clay soil. Every year it gets bigger and better. The large bright pink flowers are just beautiful and so showy. I have measured them to get 12" across. It gets filtered morning sun and full sun from about noon to 4pm. I cut the dead wood down early in spring. Easy to grow, no extra special care. I mulch all my gardens in spring. This plants roots are shaded during growing season with hardy geraniums.


On Aug 31, 2006, jachurch from Apple Valley, MN (Zone 4a) wrote:

The flower is over 11 inches across and lasts more than 1 day, depending on weather. Flower color is bright true pink. My Apple Valley MN plant grows on the west side of a building where it gets full sun all afternoon.