Salt Marsh Mallow, Seashore Mallow

Kosteletzkya virginica

Family: Malvaceae (mal-VAY-see-ee) (Info)
Genus: Kosteletzkya (koh-stel-LETZ-kee-yuh) (Info)
Species: virginica (vir-JIN-ih-kuh) (Info)



Water Requirements:

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

Sun Exposure:

Sun to Partial Shade



Foliage Color:



4-6 ft. (1.2-1.8 m)


18-24 in. (45-60 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)

Where to Grow:

Unknown - Tell us


Unknown - Tell us

Bloom Color:


Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Spring

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

From softwood cuttings

From seed; direct sow outdoors in fall

Seed Collecting:

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

Allow seedheads to dry on plants; remove and collect seeds


This plant is said to grow outdoors in the following regions:

Milton, Delaware

Fernandina Beach, Florida

Jacksonville, Florida

Port Saint Lucie, Florida

Trenton, Florida

Athens, Georgia

La Place, Louisiana(2 reports)

Westwego, Louisiana

Millersville, Maryland

Emerald Isle, North Carolina

Winnabow, North Carolina

Wilkes Barre, Pennsylvania

Blythewood, South Carolina

Charleston, South Carolina

Beaumont, Texas

Belton, Texas

Longview, Texas

Mico, Texas

Lynchburg, Virginia

show all

Gardeners' Notes:


On Jul 17, 2012, trackinsand from mid central, FL (Zone 9a) wrote:

this plant was hard to find and i've wanted one for years. when i finally tracked one down and it came this past winter, it was dormant and bare-root. i didn't hold out much hope. i planted it in a small pot and put it in my outdoor "nursery" under the eave of the house.
when spring came (very early this year), i transplanted it to an enormous bottomless pot in the garden, something i would not normally do but since this plant loves swampy conditions, i figured i'd try it.
it's been a couple of months now and the plant itself, not counting the pot is about 4' tall and full of blooms every day. the blooms aren't large; it's not going to blow you away from a distance, but it's a nice full plant and i'm enjoying it.
i've posted some pictures in the PF.
it has ... read more


On Jun 27, 2011, jameso from Longview, TX wrote:

One of the nicest blooms of I've seen although mine does not produce a lot of blooms durng the year. Grows well in the east Texas hot weather.


On Jul 1, 2003, stevemoeron wrote:

We have a plant growing almost exactly like this one but the center is not yellow but a bulbus purple. The other difference is that we are in SW PA and the ground is not marshy. It has been coming up for several years and we have been pulling it for a weed. This year we decided to let it go and it is almost 4ft now.


On Apr 17, 2002, rosemarysims from Mermentau, LA (Zone 8b) wrote:

There is also a pure white form of this plant called 'Immaculate' which was introduced by Johnny Mayronne of Natives Nursery, Covington LA. It is sometimes available in the trade.


On Apr 16, 2002, Floridian from Lutz, FL (Zone 9b) wrote:

Native to fresh and brackish marsh areas from New York to Florida and west to Louisiana, this shrubby perennial can top 6 feet and flower much of the summer.
Named for the Bohemian botanist V.F. Kosteletzky, this upright perennial mallow is similar to lavatera. It has fuzzy, light green, hibiscus-like leaves and blooms from midsummer through fall and longer in warmer climes. Salt Marsh mallow will grow equally as well in brackish swampy conditions, shallow standing water or in normal garden soil.