New Moon Nurseries


Search by Characteristic

For wet spaces, swamp mallow is naturally found in wetlands.

For wet spaces, swamp mallow is naturally found in wetlands. USDA, NRCS. 2012. The PLANTS Database (http://plants.usda.gov, 8 October 2012). National Plant Data Team, Greensboro, NC 27401-4901 USA.

Hibiscus moscheutos

Swamp mallow

FIRST IMPRESSIONS:  Hibiscus moscheutos is a statuesque perennial with large leaves and many sturdy vertical stems.  In summer, plants are crowned by striking saucer shaped flowers.  The solitary blooms are located in the upper leaf axils and are usually white with a crimson center. This species thrives in sunny moist or wet sites where it is sought after by many pollinators.

HABITAT & HARDINESS:   Hibiscus moscheutos occurs from Ontario to Massachusetts and Florida and west to Wisconsin and Texas.  The greatest distribution is in Louisiana with plants occurring in almost every parish.

Plants are indigenous to ditches, edges of brackish or freshwater swamps, marshes, wet prairies and low soggy margins of rivers or ponds.  Large impressive stands sometimes occur.

Hardy from USDA Zones 5-8.

PLANT DESCRIPTION:  Hibiscus moscheutos is a robust shrubby wildflower with multiple upright stems. 

The stems are glabrous or pubescent and are clothed in bold ovate toothed leaves.  Blades are usually unlobed but can have 2 lateral lobes. The leaf surface is grayish green and fairly smooth with lighter colored pubescent undersides.

From summer until early autumn spectacular funnel-form or saucer shaped flowers are borne in the upper leaf axils.  Blooms are 4-12” across with 5 lustrous overlapping petals. Flowers are commonly white with a crimson eye and occasionally pure white, pink or rose colored.

Each bloom lasts only a day but they are produced repeatedly for about a month and are followed by 1-2” capsules.

Plants are 4-7’ tall with a spread of 3-4’. 

CULTURAL & MAINTENANCE NEEDSHibiscus moscheutos prefers sunny exposures with rich wet to moist soils. 

Plants are fairly drought tolerant after establishment.  They also tolerate clay, muck and shallow standing water.

Stems are sturdy and rarely need staking.  They are generally cut to the ground in late winter allowing their angular capsules to provide winter interest.

Young plants are occasionally nibbled by deer.  This cotton relative is also attacked by Japanese beetles and by sawfly larva which skeletonize the leaves.  If pests are a problem, seek organic controls that will not harm beneficial pollinators.

LANDSCAPE USES:   Due to the Showy Blooms, Hibiscus moscheutos is a dramatic Accent, Grouping or Mass for a Wildlife Garden or Water Garden.  Plants are also used in Containers, as Butterfly Nectar Plants and in Cottage Gardens, Rain Gardens, Water-wise Landscapes, Low Maintenance Plantings, Perennial Borders, Roadsides and Wetlands.

COMPANION & UNDERSTUDY PLANTS:  Try pairing Hibiscus moscheutos with Asclepias incarnata, Eupatorium fistulosum, Helianthus angustifolius, Lobelia cardinalis and Panicum virgatum.

Hibiscus coccineus is a worthy substitute with similar flowers and cultural needs.

TRIVIA:  The exotic appearing supersized flowers are pollinated by native long tongued bees including the specialist Rose Mallow Bee.  Blooms provide nectar to ruby throated hummingbirds and a variety of insects.  Plants host caterpillars of gray hairstreak, painted lady butterflies, skippers and several moths including the Io Moth and Delightful Bird-Dropping Moth.

Flowers consistently open between 9:00 and 11:00 a.m. EST.  Due to this, Hibiscus moscheutos was used in a floral clock created at the New York Botanical Garden.

Pink forms of Hibiscus moscheutos that lack the crimson center were once classified as Hibiscus palustris.  Currently these plants are considered to be simply a color form of Hibiscus moscheutos.

Sometimes known as Crimson-eyed Rose Mallow and Wild Cotton.


Height:

4-7 ft

Spread:

3-4 ft

Spacing:

3-6 ft

USDA Hardiness Zone:

5-8

Bloom Color:

Pink, White

Hibiscus moscheutos Characteristics

Exposure

  • Full Sun

Critter Resistance

  • Deer Resistant

Attracts Wildlife

  • Pollinators
  • Hummingbirds
  • Butterflies

Soil Moisture Preference

  • Wet to Moist

Attributes

  • East-Coast Native
  • Coastal
  • Rain Garden
  • Bog
  • Reblooming
  • Long Blooming

Flowering Months

  • September
  • August
  • July

Foliage Color

  • Green

Season of Interest (Foliage)

  • Summer

Growth Rate

  • Fast

Salt Tolerance

  • Low

Interesting Notes:

For more information on this plant, visit the USDA PLANTS Database: http://plants.usda.gov/java/profile?symbol=HIMO


Plants that work well with Hibiscus moscheutos ''

Three-nerved Joe pye Three-nerved Joe pye (Eupatorium dubium)
Common sneezeweed Common sneezeweed (Helenium autumnale)
Swamp sunflower Swamp sunflower (Helianthus angustifolia)
Cardinal flower Cardinal flower (Lobelia cardinalis)
Switch grass Switch grass (Panicum virgatum)
American Water Plantain American Water Plantain (Alisma subcordatum)
Green Arrow Arum Green Arrow Arum (Peltandra virginica)
Pickerel Weed Pickerel Weed (Pontendaria cordata)
Switch grass Switch grass (Panicum virgatum 'Cloud Nine')
Indian grass Indian grass (Sorghastrum nutans)
Cup plant Cup plant (Silphium perfoliatum)
shrubby St John's wort shrubby St John's wort (Hypericum prolificum)
Frost Grass Frost Grass (Spodiopogon sibiricus)

Substitutions for Hibiscus moscheutos

Scarlet rose mallow Scarlet rose mallow (Hibiscus coccineus)