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Swamp Milkweed Flower

Asclepias incarnata

Regular price $5484
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Plant Size

Planting & Care

Where to Plant

  • Sunlight: Aim for at least 6 to 8 hours of direct sun daily for the best bloom production. While it survives in partial shade, the stems often become floppy and the flower clusters will be much smaller.
  • Soil: This plant thrives in heavy clay or silty soils that stay naturally moist. If you have sandy soil, mix in plenty of organic compost or peat moss to help the ground retain the moisture these roots crave.

Watering Requirements

Keep the soil consistently wet during the first growing season to help the plant establish its deep root system. While mature plants can handle average garden moisture, they will drop their lower leaves or stop blooming if the soil dries out completely. Think of this plant like a sponge that needs to stay damp to support its lush foliage and nectar-heavy flowers.

Pruning Tips

Swamp Milkweed blooms on new wood, so you should cut the dead stalks down to the ground in late winter or very early spring. This annual clearing makes room for fresh shoots and helps prevent any lingering pests or diseases from the previous year. You can also pinch back the tips of the stems in late spring to encourage a bushier shape and more flower heads.

Fertilizer Needs

Apply a light application of balanced, slow-release fertilizer or a layer of compost once every spring as new growth emerges. Avoid using high-nitrogen fertilizers because they produce soft, succulent growth that attracts aphids and causes the stems to fall over. Keeping the nutrition moderate ensures the plant stays sturdy and focuses its energy on producing flowers rather than just excess leaves.

Delivery and Shipping

Preorder Shipping Schedule

We ship your plants when it's safe to transport them to your zone. Dates are estimated and subject to weather delays.

Zone 3-4 Week of March 30th
Zone 5 Week of March 16th
Zone 6-12 Week of March 2nd


Shipping Rates

Ships in 3-4 business days • Tracking provided • Weather protected

Under $50 $9.99
$50 - $99.99 $14.99
$100 - $149.99 $16.99
$150 - $198.99 $24.99
$199+ FREE

✓ Zone-specific timing • ✓ Professional packaging • ✓ Health guarantee

Description

Showy Monarch Butterfly Host Plant, turn your plain landscape into a gorgeous habitat for butterflies! The Swamp Milkweed (Asclepias incarnata) is a native perennial that makes it easy! Milkweed's fragrant, bright pink, and white pom-pom blooms are composed of many dozens of small flowers.

You'll love the wildflower clusters in summer! Look closely to study each five-petaled true flower with its range of colors from pink to mauve into white. Smell their sweet and spicy honey-scented fragrance, too. They'll perfume your yard and boost your mood like "living aromatherapy"!

This native choice supports beneficial pollinators and butterflies with nutrient-rich nectar for several months as midsummer heats up. The garden will dance with these visitors, and every minute brings a rewarding experience for mindful watchers. Swamp Milkweed are very important host plants for Monarch caterpillars. Watch for Monarch chrysalis hanging below the undersides of the long, lance-shaped leaves.

Swamp Milkweed does take its time leafing out in spring, but once it gets going the six-inch, lance-leaf foliage will fill out your plant nicely. This native Milkweed is hardy throughout USDA growing zones 3 to 6 and grows up to 4-5 feet tall and 2-3 feet wide. There are no significant insect or disease issues with the Swamp Milkweed either! The white milky sap inside the leaves and stems is bitter and avoided by deer and rabbits, but loved by beneficial insects!

Planting and Application:

Swamp Milkweed is an attractive, herbaceous perennial that would be perfect for those difficult, low spots in your yard, as it thrives in moist conditions. You can easily incorporate this helpful plant as a lively addition to your perennial borders. Use them in planned Rain Gardens to help filter potentially polluted water runoff from roofs and streets.

This moisture-loving selection develops into a uniquely valuable "must-have '' for your Butterfly Garden! If you love butterflies, it's a great way to attract them, and Monarchs are especially fond of Milkweed. It is often planted specifically to encourage Monarchs in a region. Plant several in drifts through the center of your plantings.

Prepare to be thrilled and amazed at the amount of "flying flowers'' that you'll see working these tiny flowers over each day. Butterflies, moths, and beneficial pollinators cherish these nectar resources! Give kids and garden visitors a delightful tour through our natural world. Nature Hills is so pleased to offer this special clump-forming perennial...along with many other native wildflowers.

Milkweed contains natural compounds like cardenolides, which protect the baby caterpillars from being eaten by birds. You'll love seeing the cute black, white, and yellow caterpillars munching away on your plants!

If you grow your own food as part of an Edible Landscape, you'll definitely want to grow Swamp Milkweed near your Victory Garden to encourage pollinators to come explore your vegetables and orchards.

After the flowers have faded, Swamp Milkweed forms eye-catching four-inch pods that are a favorite of young and old alike. Once ripe, they'll split to release the brown seeds...using silky white plumes to catch the wind and reach new destinations.

These pretty blooming perennials shouldn't be considered weeds. Sticks and stones! Sure, they perform really well and can spread here and there in your yard, but you can control their self-seeding and spread by cutting off the pods before they split open. Dry them for gorgeous seasonal arrangements that last all winter long as an effective, charming method of size control!

Others encourage their growth and spend happy moments blowing their seeds to new parts of the yard. Your friends may beg you for some of the pods, too!

Wildcrafters and homesteaders can research an amazing variety of uses. In its various stages, Milkweed pods are used as a nematode insecticide, as an adhesive, and even as a poison ivy treatment.

  • Bold Pink Flowers in Round Clusters
  • Fragrant Blooms Last for Months!
  • Excellent Host Plant for Monarch Butterfly Larvae
  • Exceptional Nectar Resource
  • Rugged Wildflower & Wetland Native
  • Pollinator & Native Gardens, Naturalized & Prairie Plantings

#ProPlantTips for Care:

As its name implies, erect-branching perennial Swamp Milkweeds love moist, swampy conditions! They'll also adapt to well-drained areas with consistent moisture. You'll get the best performance with a planting site in full sun because Swamp Milkweed needs at least six hours of sunlight a day.

Ideally, they love a place that stays a bit damp. Why not decorate the area around your drain spout or create a Rain Garden with their help? This water lover needs a consistent schedule of water all season. Add a three-inch layer of mulch to cover the root system and reduce surface evaporation.

Please leave the stalks standing overwinter, as they provide valuable shelter, then cut down the stalks to an inch high in early spring.

  • Full Sun
  • Moderate to Moist Soil Conditions
  • Valuable Plant Grows Almost Anywhere Well-Drained
  • Very Cold Hardy!
  • Deer Seldom Damage This Choice

You'll be proud to plant hardy native Swamp Milkweed plants, sourced from our native plant experts. Order this excellent addition for your landscape from Nature Hills today!

Frequently Asked Questions

What type of soil does Swamp Milkweed need, and does it tolerate average garden soil?

  • Swamp Milkweed thrives in moist, wet conditions and is perfect for those difficult low spots in your yard. While it prefers consistently moist soil, it will tolerate average garden conditions once established. Plant it in areas that stay naturally damp or incorporate it into rain gardens for best results.

How much water does Swamp Milkweed require, and is it drought-tolerant once established?

  • Swamp Milkweed thrives in consistently moist conditions and is not drought-tolerant. This native perennial excels in low, wet spots and rain gardens where other plants struggle. Keep soil consistently moist for best performance. Find quality Swamp Milkweed plants at naturehills.com.

Is Swamp Milkweed a host plant for monarch butterflies?

  • Yes, Swamp Milkweed is a vital host plant where Monarch caterpillars feed and develop. You'll often find Monarch chrysalis hanging beneath the lance-shaped leaves. Plant this native perennial in zones 3-6 to create essential breeding habitat for Monarchs in your garden.

How do I care for Swamp Milkweed in its first year to help it establish?

  • Swamp Milkweed takes time to leaf out in spring but establishes well in moist conditions. Plant in consistently moist soil and be patient through its slow spring emergence. Water regularly the first season and avoid disturbing the roots as it develops its deep taproot system.

Will Swamp Milkweed spread aggressively or form clumps?

  • Swamp Milkweed forms well-behaved clumps rather than spreading aggressively, reaching 4-5 feet tall and 2-3 feet wide. This native perennial stays put in zones 3-6, making it perfect for borders and butterfly gardens. Shop at Nature Hills for reliable clump-forming plants.

How is Swamp Milkweed shipped—bare root, potted, or seeds—and when can it ship?

  • Swamp Milkweed typically ships as potted plants in spring through early fall when soil temperatures are favorable for establishment. Since this perennial is slow to leaf out in spring, plan for late spring through summer planting in zones 3-6. Order early for best selection and optimal planting timing.

How do I prune Swamp Milkweed to encourage more blooms and prevent flopping?

  • Pinch back Swamp Milkweed stems by one-third in late May to early June to prevent the 4-5 foot tall plants from flopping over. This technique also encourages bushier growth and more blooms throughout summer. Cut spent flowers regularly to extend the blooming period.

Can Swamp Milkweed survive colder winters, and how hardy is it in zones 3 or 4?

  • Swamp Milkweed is extremely cold hardy, thriving in USDA zones 3-6 including harsh northern winters. This native perennial dies back completely in fall and emerges late in spring, so don't worry if it's slow to appear. Plant it in fall for best establishment before winter.

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