Pink Flower Clusters
Produces attractive clusters of small pink to mauve flowers that add seasonal color to outdoor gardens.
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Incarnata Asclepias, commonly known as Swamp Milkweed, is a perennial flowering plant recognized for its clusters of pink to mauve flowers and narrow green leaves. It is commonly grown in pollinator gardens, native plant landscapes, and moist garden areas. Its flowers attract butterflies, including monarch butterflies, and provide valuable nectar for other pollinators.
Produces attractive clusters of small pink to mauve flowers that add seasonal color to outdoor gardens.
Provides nectar for butterflies and other pollinators, making it suitable for wildlife-friendly gardens.
Grows well in moist soil and is especially suitable for rain gardens and pond-side planting areas.
Returns year after year in suitable climates and develops upright stems with attractive foliage.
| Scientific Name | Asclepias incarnata |
| Common Name | Swamp Milkweed; Rose Milkweed |
| Plant Family | Apocynaceae |
| Seed Type | Perennial Flower Seeds |
| Plant Type | Herbaceous Perennial |
| Flower Color | Pink to Mauve |
| Growth Habit | Upright, Clump-Forming |
| Plant Height | Approximately 3–5 feet |
| USDA Hardiness Zones | Generally Zones 3–9 |
| Planting Season | Spring or Fall, depending on local climate |
| Germination Time | Approximately 10–30 days under suitable conditions |
| Germination Temperature | Approximately 65–75°F (18–24°C) |
| Sunlight | Full Sun to Partial Shade |
| Soil Requirements | Moist, fertile, well-drained soil |
| Watering | Regular watering; prefers consistently moist soil |
| Blooming Season | Summer to Early Fall |
| Plant Spacing | Approximately 18–24 inches |
| Uses | Butterfly Gardens, Rain Gardens, Borders, and Wildlife Gardens |
Grow Swamp Milkweed for its beautiful pink flower clusters and pollinator-friendly qualities. With suitable moisture, sunlight, and proper seed preparation, Asclepias incarnata can become a valuable addition to butterfly gardens, rain gardens, and perennial landscapes.
Find helpful information about Swamp Milkweed seed preparation, monarch butterflies, and suitable growing conditions.
Yes, cold, moist stratification is commonly recommended for Asclepias incarnata seeds to help break dormancy and improve germination. Place the seeds in a moist growing medium inside a sealed container or bag and refrigerate for approximately 30 days. After treatment, sow them in a suitable seed-starting mix.
Yes, Swamp Milkweed is an important host plant for monarch butterfly caterpillars. Monarchs lay their eggs on milkweed plants, and the caterpillars feed on their leaves. Its pink flowers also provide nectar for butterflies, bees, and other pollinators.
Asclepias incarnata can grow in regular garden soil if it retains adequate moisture and provides good drainage. Unlike some other milkweed species, Swamp Milkweed prefers consistently moist soil and performs well in rain gardens, low-lying garden areas, and pond-side locations. Avoid allowing the soil to dry out completely during active growth.