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HOME & GARDEN INFORMATION CENTER http://www.clemson.edu/extension/hgic HGIC 1730 1-888-656-9988 Salt Tolerant Plants for the South Carolina Coast Salt exposure is just one of the many environmental factors that makes coastal landscaping challenging. Selecting plants that are tolerant to salt exposure will increase the rate of success. Salt tolerant plants can range from highly to moderately tolerant. High salt tolerance means the plants will grow where they are subject to direct salt spray received along sand dunes and adjacent to the oceanfront. These plants are highly resistant to salt drift and can be used in exposed environments. Plants with a moderate salt tolerance will grow adjacent to the beachfront, but are sheltered by higher salt tolerant plants, structures, or sand dunes. They will tolerate some salt spray, but will grow best where they are protected from direct contact. The Palmetto palm (Sabal palmetto) is the South Carolina state tree and has a high salt tolerance. Barbara H. Smith, ©2016 HGIC, Clemson Extension Salt Tolerant Plants for the South Carolina Coast Common Name Botanical Name Trees American Holly* Ilex opaca Growing Conditions Descriptions • • • • • • • Evergreen Alternate, simple leaf 15-30 ft. tall x 10-20 ft. wide Insignificant blooms in May, red berries in Oct. Dioecious (separate female and male plants) Berries attract birds Many cultivars available • • • • • Moderate salt tolerance Zones: 5-9 Full sun to part shade Water: medium Maintenance: low Landscape Uses • Use as a specimen or hedge, berries provide winter interest Southern Red Cedar* Juniperus virginiana var. silicicola • • • Evergreen conifer Scale-like leaves 30-65 ft. tall x 8-20 ft. wide • • • • • Live Oak* Quercus virginiana • • • • Evergreen Alternate, simple leaf 40-80 ft. tall x 60-100 ft. wide Long lived • • • • • Loquat Eriobotrya japonica • • • • • • Magnolia* • Magnolia grandiflora • • • • • Evergreen Alternate, simple leaves coarsely toothed and wrinkled 15-25 ft. tall and wide Off-white fragrant blooms Nov.-Jan. Yellow to orange edible pear shaped fruit April-June Native to China and Japan Evergreen Alternate, simple dark green leaves often with brown pubescence beneath 60-80 ft. tall x 30-50 ft. wide White fragrant flowers May-June Red seeds borne in “cone-like” structures in fall Many cultivars that vary in size from 25 ft. high and up • • • • • • • • • • High salt tolerance Zones: 3- 9 Full sun Water: dry to medium Maintenance: low High salt tolerance Zones: 8-10 Full sun Water: medium to wet Maintenance: low Moderate salt tolerance Zones: 8-10 Full sun to part shade Water: medium Maintenance: low • Use as a specimen or screen. • Use as a specimen shade tree for large areas • Use as a specimen, espalier, or street tree High salt tolerance Zones: 7-9 Full sun to part shade Water: medium Maintenance: medium • Use as specimen, screen, or hedge Yaupon Holly* Ilex vomitoria • • • • • • Palms Dwarf Palmetto* Sabal minor • • • • • • Palmetto or Cabbage Palm* Sabal palmetto • • • • • Evergreen Alternate, simple leaf 15-20 ft. tall x 8-12 ft. wide White fragrant blooms in April, translucent scarlet berries in fall Dioecious Weeping cultivars are available • Evergreen Large, fan-shaped leaves up to 3 ft. across 6-10 ft. tall Cream flowers in May-June Brown to black fruits in the fall Most cold tolerant Sabal palm • Evergreen Deeply cut, curved leaves that radiate from a midrib 40-50 ft. tall Creamy white, showy flower stalks in summer Green to black fruit in the fall • • • • • • • • • • • • • • High salt tolerance Zones: 7-10 Full sun to part shade Water: medium to wet Maintenance: medium • Use as a specimen, topiary, espalier, hedge, screen, or windbreak High salt tolerance Zones: 7-10 Full sun to part shade Water: medium Maintenance: medium • Use as a specimen or in groups High salt • tolerance Zones: 8-11, can be grown in 7 with protection Full sun High drought tolerance after it is established Maintenance: medium Tolerant of hurricane damage Use as a specimen, in groupings, along streets Saw Palmetto* Serenoa repens • • • • • Shrubs American Beautyberry* Callicarpa americana • • • • • Coastal SweetPepperbush* Clethera alnifolia • • • • • Devilwood or Wild Olive* Osmanthus americanus • • • • • • • Evergreen Palmate leaf divided into 25-30 segments, sharp petioles 5-10 ft. tall Small, white flowers in May-June Black malodorous fruit in fall • Deciduous Opposite, simple leaf with saw-toothed margin 3-8 ft. tall x 3-8 ft. wide Insignificant pinkishlavender flowers in June-Aug. Showy purple fruit in the fall that attract birds Deciduous Alternate, simple leaves 4-8ft. tall x 4-6ft. wide White, fragrant panicle flowers in late June-early Aug. Attracts butterflies • Evergreen Opposite, simple, dark green, leathery leaves 15-25 ft. tall x 10-15 ft. wide Creamy white cluster, fragrant flowers in early spring Blue-purple fruit in the fall that attract birds Dioecious Deer resistant • • • • • • • • • • • • • • • • • • High salt • tolerance Zones: 8-11 Full sun to part shade High drought tolerance after it is established Low to medium maintenance Use as a specimen, or as an under- planting for larger plants or trees Moderate salt tolerance Zones: 6-10 Full sun to part shade Water: medium Maintenance: medium • Use as a specimen, shrub border, or naturalizing Moderate salt tolerance Zones: 4-9 Full sun to part shade Water: medium to wet Maintenance: low High salt tolerance Zones: 6-9 Full sun to part shade Water: medium Maintenance: low • Use in a shrub border or naturalized areas • Use as a hedge, screen, or small ornamental tree Dwarf Yaupon Holly* Ilex vomitoria nana • • • • • Fatsia Fatsia japonica • • • • • • Groundsel* Baccharis halimifolia • • • • • • • Inkberry Holly* Ilex glabra • • • • • Evergreen Alternate, simple leaf 3-5 ft. tall x 3-6 ft. wide White fragrant blooms in April, translucent scarlet berries in fall Dioecious-female and male plants Many dwarf cultivars Evergreen Alternate, glossy green palmate leaves 6-10 ft. tall x 6-10 ft. wide White panicle blooms in Oct.-Nov. Blue fleshy fruit ripens in winter to early spring Native to Japan Semi-evergreen to deciduous Alternate, simple gray-green to green leaves 5-12 ft. tall and wide Dioecious, female has white flowers and male has yellow in early summer Cottony white fruit in the late summer and fall Attracts birds and butterflies Evergreen Alternate, simple leaves 6-8 ft. tall x 8-10 ft. wide Insignificant flowers in May Berry-like, black drupe Sept.-May • • • • • • • • • • • • • • • • • • • • High salt tolerance Zones: 7-10 Full sun to part shade Water: medium to wet Maintenance: medium Moderate salt tolerance Zones: 8-10 Part to full shade Water: medium Maintenance: low • Use as a foundation plant, low hedge or border • Use as a bold texture accent specimen High salt tolerance Zones: 8-10 Full sun to part shade Water: dry to medium Maintenance: low • Use as a naturalized hedge or in dry, low maintenance areas Moderate salt tolerance Zones: 4-9 Full sun to part shade Water: medium to wet Maintenance: low • Use in foundations, hedges, masses, or as an accent plant Oleander Neurium oleander • • • • • • • Pineapple Guava Acca sellowiana • • • • • • Pittosporum Pittosporum tobira • • • • • • • Evergreen Opposite or whorled, simple leaves 6-12 ft. tall and wide Flowers in a wide range of colors, summer-fall Many cultivars All parts of the plant are toxic Native to Europe and Asia Evergreen Opposite, simple leaves 10-15 ft. tall and wide White flowers with red centers, edible, May-June Yellow, edible, eggshaped fruit in late summer to fall Native to South America Attracts birds Evergreen Alternate, simple leaves 3-12 ft. tall x 3-18 ft. wide, depending on cultivar Creamy white, fragrant orange blossom scented flowers in April-May Many cultivars Native to China and Japan • • • • • • • • • • • • • • • High salt tolerance Zones: 8-11 Full sun to part shade Water: medium Maintenance: low • Use as in foundation plantings, hedges, screens, and borders Moderate salt tolerance Zones: 8-10 Full sun to part shade Water: medium Maintenance: medium • Use as a specimen, espalier, topiary hedge, screen, or windbreak High salt tolerance Zones: 8b-10 Full sun to part shade Water: medium Maintenance: low • Use as foundation plantings, hedges, screens, or containers Podocarpus Podocarpus marcophyllus • • • • • • • • Red Buckeye* Aesculus pavia • • • • • • Southern Waxmyrtle* Morella cerifera • • • • • • • • Yucca or Adam’s Needle* Yucca filamentosa • • • • • • • Evergreen Spirally arranged, needle-like leaves 3-30 ft. tall x 6-20 ft. wide, depending on cultivar Insignificant flowers Edible, red-purple fruit Dioecious Many cultivars Native to China and Japan Deciduous Opposite, palmately compound leaves 25-30 ft. tall and wide Red tubular flowers in in April-May Attract hummingbirds and butterflies Seed capsule with 1-3 buckeye seeds in the fall Deer resistant Evergreen Alternate, simple leaves 15-20 ft. tall and wide Insignificant flowers on female plants in May Grayish-white waxy fruit in late summer Dioecious Smaller cultivars are available Attract birds Evergreen Stiff, spine-tipped leaves 4-8 ft. tall x 2-3ft. wide Large, creamy-white bell-shaped flowers on tall stalks in June-July Attracts butterflies Drought tolerant • • • • • • • • • • • • • • • • • • • • High salt tolerance Zones: 8-10 Full sun to part shade Water: medium Maintenance: medium • Use in foundation plantings, specimen, hedge, or screen Moderate salt tolerance Zones: 4-8 Full sun to part shade Water: medium Maintenance: medium • Use as a hedge or specimen tree High salt tolerance Zones: 8-11 Full sun to part shade Water: dry to medium Maintenance: low to medium • Use as a specimen, topiary, hedge or screen Moderate salt tolerance Zones: 5-10 Full Sun Water: dry to medium Maintenance: low • Use in borders, dry garden areas, and for architectural interest Grasses American Beach Grass* Ammophila breviligulata • • • • • Bitter Panicum* Panicum amarum • • • • • Muhly Grass** Muhlenbergia capillaris • • • • • Cool season perennial Long, narrow leaves, deeply furrowed upper surface, smooth underside 2-3 ft. tall x 6-10 ft. wide Blooms in early summer with seed head in late July-Aug. Spreading, clumping grass • Warm season perennial Bluish-green, thin leaves 3-4 ft. tall x 2-3ft. wide Narrow white bloom late summer through fall Spreads slowly by rhizomes Warm season perennial Glossy, wiry, threadlike dark green leaves 2-3 ft. tall x 2-3 ft. wide 12” tall purple-pink airy flower spikes in the fall Grows in clumps • • • • • • • • • • • • • • High salt tolerance Zones: 4-9 Full sun Water: dry Maintenance: low, but does not tolerate heavy foot traffic • Use on sand dunes for erosion stabilization High salt tolerance Zones: 2-9 Full sun Water: dry to medium Maintenance: low • Use on dunes for erosion stabilization, accent, masses, and in borders Moderate salt tolerance Zones: 5-9 Full sun Water: moist to dry Maintenance: low • Use in perennial borders, accent, masses, and naturalized areas Sea Oats* Uniola paniculata • • • • • • Coastal Little Bluestem* Schizachyrium littorale • • • • • Saltmeadow Cordgrass* Spartina patens • • • • Warm season perennial Long narrow, 1 in. wide leaves that taper toward the ends 3-8 ft. tall and spreading 6-8 ft. tall panicle flower that produces flat spikelets containing seeds in summer to fall Spreads by creeping rhizomes Protected by state law that prohibits picking or destroying the grass Warm season perennial Coarse blue-green stems with purplish basal leaves 1-2 ft. tall and wide 3 in. long seed head clusters in the late summer and early fall Grows in clumps • Warm season perennial ½-1 ft. long, narrow, cylindrical leaves 1-2 ft. tall and spreading Purple flowers with wheat-like seeds on one side of the stalk June-Oct. • • • • • • • • • • • • • • • High salt tolerance Zones: 8b-12 Full sun Water: dry Maintenance: low • High salt • tolerance Zones: 4-9 Full Sun Water: dry to medium with poor flood tolerance Maintenance: low Does not tolerate large amounts of sand accumulation High salt • tolerance Zones: 8b-12 Full sun Water: wet to moist Maintenance: low Use on dunes for erosion stabilization, accent, masses, and naturalized areas Use on secondary dunes as erosion stabilization Use for shoreline protection, tidal marsh restoration, dune erosion stabilization Perennials Beach Evening Primrose* Oenothera drummondii • • • • • Bee balm* Monarda didyma • • • • • Dune Sunflower* Helianthus debilis Euryops Euryops pectinatus ‘Virdis’ • • • • • Perennial Grey- to blue-green leaves ½ in.-1 ft. tall x 1-2 ft. wide, spreading 3 in. yellow flowers that open for one day April-frost Attracts butterflies and bees Perennial Opposite, simple medium to dark green leaves 2-4 ft. tall and 2-3 ft. wide 3-4 in. rounded, tubular, two-lipped scarlet-red flowers July-Aug Attracts hummingbirds and butterflies • Semi-evergreen perennial • Long, narrow green leaves • 2-4 ft. tall and wide • 3 in. composite yellow flowers with brown centers • Attracts butterflies Evergreen perennial Deeply cut dark green leaves 4-6 ft. tall and wide 1-2 in. daisy-like bright yellow flowers Native of South Africa Attracts butterflies • • • • • • • • • • • • • • • • • • • • High salt tolerance Zones: 8b-11 Full sun Water: dry to moist Maintenance: low • Use for erosion stabilization, ground covers Moderate salt tolerance Zones: 4-9 Full sun to part shade Water: medium Maintenance: medium • Use in borders, cottage gardens, native plant gardens, or naturalized planting High salt tolerance Zones: 8b-10 Full sun Water: dry Maintenance: low • Use for ground covers, masses, borders Moderate salt tolerance Zones: 8-11 Water: dry to medium Maintenance: medium Keep the old flowers deadheaded to encourage blooming • Use in borders, rock gardens, or masses Lantana ‘Miss Huff’, ‘Mozelle’, ‘Chapel Hill’, Chapel Hill Gold’ Lantana camara • • • • • • Lavender Cotton Santolina chamaecyparissus • • • • • Lily-of-the-Nile • Agapanthus africanus • • • Mexican Bush Sage Salvia leucantha • • • • • • • Perennial- only the specific named varieties ‘Miss Huff’, ‘Mozelle’, ‘Chapel Hill’, or ‘Chapel Hill Gold’ Long oval dark green wrinkled leaves 3-6 ft. tall and wide 2 in. tiny 5-lobed clustered white, yellow, orange, pink mixed flowers Native to Central and South America Attracts butterflies • Evergreen perennial Silver-gray aromatic leaves 1-2 ft. tall x 2-3 ft. wide ¾ in. button-like bright yellow flowers in summer Native of the Mediterranean Tender perennial Long, grass-like leaves 1½-2 ft. tall and wide 18-24 in. clusters of blue or white bellshaped flowers JuneJuly Native of South Africa Tender perennial Long lance-shaped grey-green leaves 2-3 ft. tall and wide 10 in. long dense, arching purple and white to solid purple flower spikes Augfrost Native to Mexico and Central America Attracts butterflies • • • • • • • • • • • • • • • • • • • Moderate salt tolerance Zones: 7-11 Water: dry to medium Maintenance: low Do not prune the plant after frost. Prune the dead branches in the early spring when the new foliage begins to emerge from the base of the plant Moderate salt tolerance Zones: 6-9 Full sun Water: dry to medium Maintenance: medium • Use in borders, rock gardens, or masses • Use in herb or rock gardens, borders, or masses Moderate salt tolerance Zones: 8-10 Full sun to part shade Water: medium Maintenance: medium Moderate salt tolerance Zones: 8-10 Full sun Water: medium Maintenance: low • Use in containers or pots, borders • Use in borders, masses, or in containers Rosemary Rosmarinus officinalis • • • • • • Seaside Goldenrod* Solidago sempervirens • • • • • • Annuals Blanket Flower or Firewheel* Gaillardia pulchella • • • • • Madagascar Vinca or Periwinkle Catharanthus roseus • • • • • Perennial Grey-green linear aromatic leaves 2-6 ft. tall x 2-4 ft. wide Small, two-lipped pale blue to white flowers Jan-April Native to Africa, Europe, western Asia Attracts butterflies and bees Perennial Long, thick, leathery, dark green leaves 3-6 ft. tall x 1 ft. wide 6 ft. large, yellow flower spikes AugNov Attracts birds, bees, and butterflies. Important food source for migrating Monarch butterflies • Annual or short-lived perennial Oblong greyish-green leaves 1-1 ½ ft. tall x ½-1 ft. wide Daisy-like red, yellow, and brown flowers June-frost Attracts birds and butterflies • Annual Oblong shiny green leaves ½-1 ft. tall and wide 1-2 in. white, pink, purple, lavender, or red flowers late spring to frost Native to Madagascar • • • • • • • • • • • • • • • • • Moderate salt tolerance Zones: 8-10 Full sun Water: dry to medium Maintenance: medium • Use in herb gardens, borders, foundations, or containers High salt tolerance Zones: 3-11 Full sun Water: dry to moist Maintenance: low • Use in borders, wildflower gardens, masses High salt • tolerance Full Sun Water: dry to well drained Maintenance: low For dune establishment, plant seeds and water well until germination Moderate salt • tolerance Full sun to part shade Water: medium, will rot if kept too wet Maintenance: Low Use in borders, masses, naturalizing on dunes Use as summer color in borders, masses, edging, or containers Mexican Sunflower Tithonia rotundifolia • • • • • • Narrow-leaf Zinnia* Zinnia angustifolia • • • • Moss Rose Portulaca grandiflora • • • • • • Salvia Salvia splendens • • • • • • • Annual Long, simple or lobed dark green leaves 4-6 ft. tall x 2-3 ft. wide 3 in. orange to orangered sunflowers summer to frost Native to Mexico and Central America Attracts hummingbirds and butterflies Annual Narrow medium green leaves ¾-1½ ft. tall x ¾-1 ft. wide 1 in. daisy-like red, orange, yellow, white, or bicolor flowers summer to frost Attracts butterflies Annual Cylindrical, fleshy leaves ¼- ¾ ft. tall x ½-1½ ft. wide 2 in. orange, yellow, red, pink, white, or bicolor flowers summer to frost Flowers will not open on cloudy or rainy days Native to India Annual Oval dark green leaves 1-2 ft. tall x ¾1½ ft. wide 2 in. red, lavender, orange, white, or bicolor tubular flowers on spikes late spring to frost Native to Brazil Attracts birds, hummingbirds, and butterflies • • • • • • • • • • • • • • • • Moderate salt tolerance Full Sun Water: dry to medium Maintenance: low • Use in border backgrounds or masses Moderate salt tolerance Full sun Water: dry to medium Maintenance: low • Use as summer color in beds, edging, masses, or containers Moderate salt tolerance Full Sun Water: dry to well-drained Maintenance: low • Use for summer color in dry soils, rock gardens, containers, or hanging baskets Moderate salt tolerance Full sun to part shade Water: medium Maintenance: low • Use as summer color in beds, borders, and containers Tropical Lantana Lantana camara • • Annual Long oval dark green wrinkled leaves • 3-6 ft. tall and wide • 2 in. tiny 5-lobed clustered white, yellow, orange, red, lavender, pink or mixed color flowers • Native to Central and South America • Attracts butterflies *Denotes native to the Southeast • • • • • Moderate salt tolerance Zones: 10-11 Full sun Water: dry to medium Maintenance: low • Use as summer color in beds, borders, containers, or hanging baskets The following websites have more information about regulations regarding landscaping along the coast: Life Along the Salt Marsh: Protecting Tidal Creeks with Vegetative Buffers http://www.clemson.edu/extension/hgic/water/resources_stormwater/life_along_the_salt_marsh_protecting_t idal_creeks_with_vegetative_buffers.html Ocean and Coastal Resource Management DHEC Critical Area/Wetlands Permitting Forms http://www.scdhec.gov/Environment/PermitCentral/ApplicationForms/#Ocrm SCDNR Sea Oats http://www.dnr.sc.gov/marine/mrri/acechar/speciesgallery/Plants/SeaOats/index.html How to Build a Dune https://www.scdhec.gov/environment/docs/duneshowto.pdf Prepared by Barbara H. Smith, HGIC Horticulture Extension Agent, Clemson University, 03/17. This information is supplied with the understanding that no discrimination is intended and no endorsement of brand names or registered trademarks by the Clemson University Cooperative Extension Service is implied, nor is any discrimination intended by the exclusion of products or manufacturers not named. All recommendations are for South Carolina conditions and may not apply to other areas. Use pesticides only according to the directions on the label. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Follow all directions, precautions and restrictions that are listed. The Clemson University Cooperative Extension Service offers its programs to people of all ages, regardless of race, color, sex, religion, national origin, disability, political beliefs, sexual orientation, marital or family status and is an equal opportunity employer. Clemson University Cooperating with U.S. Department of Agriculture, South Carolina Counties, Extension Service, Clemson, South Carolina. Issued in Furtherance of Cooperative Extension Work in Agriculture and Home Economics, Acts of May 8 and June 30, 1914 Public Service Activities