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Hardy Hibiscus, Rose Mallow, Swamp Mallow 'Lady Baltimore'

Hibiscus moscheutos

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Hibiscus (hi-BIS-kus) (Info)
Species: moscheutos (mos-KEW-tos) (Info)
Cultivar: Lady Baltimore
» 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)

Patent Information:


Propagation Methods:

By dividing the rootball

From herbaceous stem cuttings

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

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:

Prattville, Alabama

Tucson, Arizona

Bigelow, Arkansas

Hampton, Florida

Orange Park, Florida

Chickamauga, Georgia

Farmersburg, Indiana

Cedar Rapids, Iowa

Olathe, Kansas

Belle Chasse, Louisiana

Coushatta, Louisiana

Folsom, Louisiana

Elkton, Maryland

Upper Marlboro, Maryland

Roslindale, Massachusetts

Dearborn Heights, Michigan

Saint Louis, Missouri

Jefferson, New York

Raleigh, North Carolina

Whiteville, North Carolina

Stayton, Oregon

Bluffton, South Carolina

Conway, South Carolina

North Augusta, South Carolina

Rockvale, Tennessee

Austin, Texas

Copperas Cove, Texas

El Campo, Texas

New Braunfels, Texas

Temple, Texas

Lexington, Virginia

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Gardeners' Notes:


On Oct 6, 2014, mskasik from New Braunfels, TX wrote:

I live in New Braunfels, TX and the 'Lady" is planted on the west side of our brick house where she gets full, hot, Texas sun all afternoon long. She is on drip irrigation and heavily mulched. The plant will be late to come up in the spring. Every year it gets bigger and the stalks taller. I now have 7 stalks with multiple flowers on each one. Lady Baltimore has taken Best of Show for cut flowers at the Comal County Fair in two different years. I cut the largest bud, enter it just at closing time, (6 pm) and by the time the judges come to look and vote, the bud is open. Easily 7 to 8 inches across. A real show-stopper. We are Zone 8a/8b for cold and Zone 9 for heat.


On Mar 29, 2014, coriaceous from ROSLINDALE, MA wrote:

A superb perennial, and my favorite hardy herbaceous hibiscus. The flowers look tropical, even more than those of the other hardy hibiscus hybrids. I also like that it's taller than most of the recent generation of hybrids, which were bred with 18" retail shelving in mind.

The deeply cut leaves give its foliage a finer texture than most of the hardy hibiscus, which tend to be coarse. They also allow more light through, which helps keep it from smothering its neighbors in a border or bed.

Like all herbaceous hibiscus, this is very late to emerge from dormancy in spring. This is an opportunity to underplant it with spring bulbs or ephemerals. In the fall, I leave 6" stubs on the stems to help me remember where the plant is in the spring.

In Z6, I ... read more


On Jun 10, 2010, malakai from Hampton, FL wrote:

When I first bought this plant, it seemed to die off quickly, and I had no idea why. The next season, it came back and bloomed, which was a welcome surprise. Here in Florida, these seem to have a very short growing and blooming season, and they don't seem to spread much. Because of their short blooming season, I would only recommend these in mixed plantings here.


On Jun 24, 2007, lee_ro from Raleigh, NC wrote:

Beautiful blooms, a spectacular plant indeed! I bought a Lady Baltimore last year and it looks lovely in my garden. It doesn't flower as prolifically as my other hardy hisbiscus do, but that doesn't take away from the plant's splendor. Mine is very well behaved (gives me no trouble at all), performing beautifully with only two tall stems (about 4ft) shooting out of the ground, adorned with a dozen or so buds right now. I can't wait until it becomes established in my garden- I imagine it'll be quite a site! I've got hydrangea and another pink rose mallow nearby with white jasmine climbing all over the fence behind the garden. The pink, blue, and white color scheme looks great. I recommend moscheutos to anyone who's ever loved big, tropical, exotic shrubs-- they're low maintenence stu... read more


On Jul 23, 2006, mlagarelli from Elkton, MD wrote:

This is our first year gardening and I must admit that I was dubious about placing Lady Baltimore in a prominate place in our garden. But, I trusted our Landscape Architect and purchased three 1 gallon size plants despite my reservations. The foliage is not very attractive and more than one visitor has asked how our "tomatoes" are doing. I must admit that we were blown away when the first bloom opened. What a spectacular flower! Lady Baltimore is now the focal point of our planting bed. And, those "tomatoe lovers" are now scrambling to add this hardy hybiscus to their own landscapes.