Swamp Milkweed grows in wetlands and along stream edges, producing clusters of bright pink-to-mauve flowers in summer. It is one of the most important milkweeds for monarch butterflies in the eastern United States, providing both larval food and adult nectar. The seed pods split open in fall to release seeds with silky white hairs.
Best time to see a Swamp Milkweed
The best time to see a Swamp Milkweed is June–July, when about 63% of U.S. sightings happen, based on 37,780 research-grade iNaturalist observations.
Not certain it is a Swamp Milkweed? What plant is this? walks through what to check first and the lookalikes that catch people out.
Recent Swamp Milkweed sightings near you
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