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Vine milkweed, Gulf Coast swallowwort
Seutera angustifolia

Copyright by: Shirley Denton

General Landscape Uses: Primarily recommended for natural landscapes and habitat restorations. Also butterfly gardens in wet brackish areas along the coast.

Ecological Restoration Notes: Most common in tidal marshes, where its occurrence is somewhat sporadic.

Availability: Grown by enthusiasts.

Description: Scrambling or twining vine with narrow leaves.

Dimensions: N/A; vine with stems to 10 feet or more in length.

Growth Rate: Moderate to fast.

Range: Southeastern United States west to Texas and south to the Monroe County Keys; West Indies, Mexico and Central America.

Map of select IRC data from peninsular Florida.

Habitats: Tidal marshes, coastal thickets and marl prairies.

Soils: Wet to moist, poorly-drained to periodically inundated brackish or freshwater soils.

Nutritional Requirements: Moderate; can grow in nutrient poor soils, but needs some organic content to thrive.

Salt Water Tolerance: Moderate; tolerates brackish water or occasional inundation by salt water.

Salt Wind Tolerance: Moderate; grows near salt water, but is protected from direct salt spray by other vegetation.

Drought Tolerance: Low; requires moist to wet soils and is intolerant of long periods of drought.

Light Requirements: Full sun.

Flower Color: Greenish-white.

Flower Characteristics: Inconspicuous.

Flowering Season: Spring-fall.

Fruit: Slender pod with wind dispersed seeds.

Wildlife and Ecology: Rarely a larval host plant for queen (Danaus gilippus) butterflies; a possible larval host for soldier (Danaus eresimus) butterflies. Nectar plant for butterflies and other insects.

Horticultural Notes: Can be grown from seed or cuttings.

Comments: The sap is white.

Copyright by: Shirley Denton

Copyright by: Shirley Denton

Copyright by: Keith A. Bradley

Copyright by: Keith A. Bradley

Other data on Seutera angustifolia available from:

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