How much sun does Gulf Coast swallow wort need?

Gulf Coast swallow wort grows best in part sun conditions.

When does Gulf Coast swallow wort bloom?

Gulf Coast swallow wort blooms in May, June, July, and August.

Where is Gulf Coast swallow wort native?

Gulf Coast swallow wort (Pattalias palustris) is native to AL, FL, GA, LA and 4 more states, per the World Checklist of Vascular Plants (Kew).

What pollinators does Gulf Coast swallow wort attract?

Gulf Coast swallow wort draws flies and native bees.

Gulf Coast swallow wort

Name: Pollinator Patch
Author: Pollinator Patch

Pattalias palustris

Last reviewed: October 2026

Gulf Coast swallow wort (Pattalias palustris) is a perennial vine native to AL, FL, GA, LA and 4 more states. It blooms in May, June, July, and August. The flowers draw flies and native bees.

Toxicity unknown

Gulf Coast swallow wort (Pattalias palustris) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

part sun

Water

high

Size

36"–96" H × 24"–48" W

Bloom

May, Jun, Jul, Aug

Native to

AL, FL, GA, LA and 4 more states

Pollinators

flies, native bees

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 458 programs across 44 states, each with a link to the provider and the date we last checked it.

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Browse plants for this ecoregion

Middle Atlantic Coastal Plain Southern Coastal Plain Southern Florida Coastal Plain

A twining, milkweed-family vine with slender stems and small, star-shaped pale flowers. It grows scrambling through vegetation at the edges of swamps and wet woodlands.

Growing Gulf Coast swallow wort

Grow Gulf Coast swallow wort in part sun and high water. Mature plants reach 36 to 96 inches tall and spread 24 to 48 inches wide.

Wildlife value

Its small flowers attract flies and native bees, and the vine adds structural cover along wetland margins.

Common questions

How much sun does Gulf Coast swallow wort need?: Gulf Coast swallow wort grows best in part sun conditions.
When does Gulf Coast swallow wort bloom?: Gulf Coast swallow wort blooms in May, June, July, and August.
Where is Gulf Coast swallow wort native?: Gulf Coast swallow wort (Pattalias palustris) is native to AL, FL, GA, LA and 4 more states, per the World Checklist of Vascular Plants (Kew).
What pollinators does Gulf Coast swallow wort attract?: Gulf Coast swallow wort draws flies and native bees.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

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