Hardy Hibiscus, Rose Mallow, Swamp Mallow 'Cranberry Crush'

Hibiscus moscheutos

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: moscheutos (mos-KEW-tos) (Info)
Cultivar: Cranberry Crush
Additional cultivar information:(PP21984; Summerific series; aka Summerific Cranberry Crush)
Hybridized by Walters Gardens
Registered or introduced: 2009
» View all varieties of Hibiscus


36-48 in. (90-120 cm)


4-6 ft. (1.2-1.8 m)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

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)

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:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

Seed Collecting:

Unknown - Tell us

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


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

Minneapolis, Minnesota (2 reports)

Raleigh, North Carolina

Sumter, South Carolina

Copperas Cove, Texas

Richmond, Texas

Gardeners' Notes:


On Aug 19, 2014, MaryArneson from Minneapolis, MN (Zone 4b) wrote:

Wow. I bought this hardy hibiscus at a late season sale in the fall of 2013, and then we had a very cold winter with many days below zero. There was no sign of life from the plant in the spring. Then in summer, it erupted. It is covered with buds, and every day a couple of impossibly huge, deep red blooms turn the corner of my vegetable garden into a tropical paradise. It is clearly tough enough for Minneapolis


On Oct 13, 2010, vossner from Richmond, TX (Zone 9a) wrote:

Super dark red color on this hardy hibiscus makes it stand out from many feet away. And it doesn't require the TLC that tropicals hibiscus do. What's not to love about this low maint. plant. I don't know if it produces seeds, I sure hope so. Would love to have a big patch of this beauty growing in my garden.
UPDATE 7/17: still growing in my garden but has not expanded much. It does seem to produce more flowers.