Kosteletzkya Pentacarpos (Coastal Mallow, Seashore Mallow)

Kosteletzkya pentacarpos (Coastal Mallow, Seashore Mallow)


Article by Extension Master Gardener℠ volunteer Kathryn Copley

Flower, Buds, Stem - Aug - Durham Co., NC Girish Bhatt CC BYNC- SA 4.0
Flower, Buds, Stem - Aug - Durham Co., NC Girish Bhatt CC BYNC-
SA 4.0

Eye-catching solitary hibiscus-like 1 ½ - to 2 ½-in. pink flowers appear on Seashore Mallow from July to October, with their nectar attracting pollinators like hummingbirds, butterflies and other pollinators.

Common names include:
  • Coastal Mallow
  • Seashore Mallow
  • Previously known as Kosteletzkya virginica
Seashore mallow is a low-maintenance native short-lived subshrub in the Malvaceae (mallow) family (the same family as cotton). Also known as sweat weed, Virginia saltmarsh mallow, and salt marsh mallow, this native plant is found in marshes and brackish water along the eastern seashore of the United States.

Seashore mallow is moderately salt tolerant, growing in full sun (6 or more hours of direct sunlight a day) in wet to well-drained but moisture-retentive sites. It can handle occasional flooding.

Kosteletzkya virginica bloom detail Debbie Roos
Kosteletzkya virginica bloom detail Debbie Roos

It grows 3- to 6-ft. tall and 2- to 4-ft. wide with soft gray-green angular leaves.

Consider including Seashore Mallow in a butterfly, native plant, pollinator, rain or water garden.

This plant was selected as the 1990 NC Wildflower of the Year, a program managed by the North Carolina Botanical Garden with some financial support from the Garden Club of North Carolina.

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By Kathryn Copley, Extension Master Gardener℠ volunteer, Brunswick County, NC. For more information on gardening in Brunswick County, please call the Brunswick County Cooperative Extension Office 910-253-2610