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Growing Inspiration
Inspiration for future Agardeni growing environments.
Cultivar
Asclepias incarnata
Swamp Milkweed is an upright, clump-forming native perennial that thrives in wet to moist garden settings. It produces clusters of fragrant, rose-pink flowers in summer that attract a variety of pollinators. This plant is essential for butterfly gardens, specifically serving as a larval host plant for monarch caterpillars.
Asclepias incarnata, or Swamp Milkweed, is a beautiful, moisture-loving native perennial prized for its fragrant pink blossoms and role as a vital host plant for monarch butterflies.
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18-plant pack · Ship
$67.59 total
2160 plants available · max 120 packs
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Cultivar Story
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Inspiration for future Agardeni growing environments.
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A realistic representation of the starter plants offered in 18, 36, and 72 plant quantities.
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Grow your aspirational plan into an inspirational garden.
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A closer look at the fruit, flower, foliage, or mature defining characteristics of this cultivar.
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Begin with a starter plant and establish it in a larger pot using quality potting soil with beneficials and fertilizer.
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See this cultivar from starter plant to aspirational garden.
Plant Profile
Key growing information first, with the complete reviewed cultivar profile available when you want it.
Sun
Full sun
Water
Prefers consistently moist soil; avoid allowing the soil to dry out completely, especially during the first growing season.
Mature size
3-4 feet tall and 2-3 feet wide
Hardiness
3-9
Growth habit
Upright, clumping perennial
Plant type
Perennial
Care, size, flowering, climate, soil, health, and additional reviewed data.
Good to know
Unlike other milkweeds, this species prefers consistent moisture and tolerates heavier, damp soils quite well.
Very cold hardy; thrives in summer heat provided moisture is adequate.
Produces clusters of fragrant, rose-pink flowers in mid-to-late summer, followed by ornamental, narrow seed pods.
Everyday care, growth, feeding, and pruning guidance.
Sun / light
Full sun
Growth rate
Moderate
Fertilizer
Generally does not require heavy feeding; a light application of balanced, organic fertilizer in spring is sufficient.
Pruning
Cut back dead stems to the ground in late winter or early spring before new growth appears.
Care notes
Unlike other milkweeds, this species prefers consistent moisture and tolerates heavier, damp soils quite well.
How the plant grows and the space it needs at maturity.
Mature size
3-4 feet tall and 2-3 feet wide
Growth habit
Upright, clumping perennial
Spacing
18-24 inches
Flowering, fruiting, pollination, bloom, and harvest behavior.
Flowering / fruiting
Produces clusters of fragrant, rose-pink flowers in mid-to-late summer, followed by ornamental, narrow seed pods.
Cold, heat, chill, and regional growing considerations.
Hardiness zones
3-9
Temperature
Very cold hardy; thrives in summer heat provided moisture is adequate.
Moisture, drainage, soil, and pH preferences.
Watering
Prefers consistently moist soil; avoid allowing the soil to dry out completely, especially during the first growing season.
Soil
Rich, loamy, or clay-based soils that retain moisture.
Soil pH
6.0-7.5
19 additional reviewed fields from this Plant.id.
Container Growing
Suitable for large containers provided they are kept well-watered; ensure the soil mix is moisture-retentive.
Family
Apocynaceae
Foliage Look
Smooth, lance-shaped, bright to medium green foliage with an opposite arrangement.
Foliage Rules
Leaves must be lanceolate, pointed, and arranged in an opposite, decussate pattern along the stem.
Fruit Flower Look
Dense, rounded clusters of small, fragrant, star-like pink flowers followed by upright, thin seed pods.
Fruit Flower Rules
Flowers are small, five-petaled, and form dense, rounded umbels; seed pods are long, spindle-shaped, and usually appear after flowering in late summer.
Growth Habit Rules
Should appear as an upright, non-spreading clump; do not depict as a creeping groundcover or a woody shrub.
Mature Plant Look
A stately, upright, clumping perennial topped with clusters of rose-pink, nectar-rich flowers.
Mature Stage Morphology
Features tall, sturdy stems with opposite, smooth-margined, willow-like leaves and large, terminal umbels of small pink flowers.
Morphology Rules
Ensure the plant appears as a clean, upright herbaceous perennial; roots should be fibrous but compact in a starter state.
Plant Faqs
How much water does Swamp Milkweed need? Keep the soil consistently moist as it naturally thrives in wet areas. Will this plant attract butterflies? Yes, it is a primary host plant for monarch butterflies and a nectar source for many pollinators. Can I grow this in a pot? Yes, use a large, moisture-retentive container and ensure it never fully dries out. How tall does it get at maturity? It typically grows between 3 to 4 feet tall.
Root Look
Clean, light-colored fibrous roots within a firm, damp plug.
Soil Look
Dark, moist, organic-rich potting medium.
Starter Stage
Small, upright herbaceous stems with opposite, lance-shaped leaves, developing from a compact root system.
Starter Stage Morphology
Young plants have a distinct, clean, upright form with bright green foliage, showing no signs of flowers until the second season.
Video Voiceover Script
Welcome to Agardeni, where inspiration for gardening helps us imagine how and where we will grow Swamp Milkweed. This is Swamp Milkweed, available as 18, 36, and 72 plant starter trays through the Agardeni Marketplace. Let Swamp Milkweed become part of your aspirational plan, helping you imagine the future growing space you want to create. This native perennial features elegant, fragrant pink flower clusters that provide a critical nectar source and host environment for monarchs. Establish your starter plug in a four inch pot with well-draining soil, then move it to a moist, sunny garden spot when established. Find your inspiration with Agardeni. Explore real plants and real availability. Start. Plan. Grow.
Youtube Tags
Asclepias incarnata Swamp Milkweed Agardeni native plants pollinator garden monarch butterfly perennial flowers butterfly host plant moisture loving plants gardening
Youtube Video Summary
Swamp Milkweed is a vital native perennial known for its fragrant, pink summer blooms and essential support for monarch butterfly populations. It thrives in moist soil, making it a perfect, low-maintenance addition to any garden landscape.
Youtube Video Title
Growing Swamp Milkweed Asclepias incarnata
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Possible future seller options for 2.5-inch, 4-inch, and 1-gallon finished plants.