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Swamp Milkweed Flower

Asclepias incarnata

  • Essential Monarch Butterfly Host Plant with Fragrant Pink Pom-Pom Blooms
  • Cold Hardy: Thrives in Zones 3-6
  • Grows 4-5 ft Tall, 2-3 ft Wide
  • Showy Pink, White Blooms From Late Summer to Early Fall
  • Deer Resistant, Rabbit Resistant
Regular price $5484
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Plant Size

Specifications

Plant specifications
Plant Characteristics Cold hardy, Low Maintenance, Native, Flowering, Fragrant, Deer-resistant, Wet Soils, Attracts pollinators, Attracts Butterflies, Non-invasive
Hardiness Zone 3a to 9b
Sunlight Full sun, Partial shade
Height 4-5 ft
Width 2-3 ft
Watering Needs High
Preferred Soil Clay, Loamy, Peaty
Growth Rate Moderate
Growth Habit Compact, Upright
Plant Life Cycle Perennial
Blooms In Fall, Summer
Flower Color Pink, White
Foliage Color Green
Fragrant Yes
Native Yes
Pet Safety Toxic to pets
Suitable Space Outdoors
Botanical Name Asclepias incarnata
Species incarnata
Class Magnoliopsida
Does Not Ship To AK, HI, ID, MT, PR

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.