Swamp Milkweed (Asclepias incarnata 'Ice Ballet') in the Milkweeds Database

Common names:
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General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Wet
Wet Mesic
Dry Mesic
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 24 - 48 inches
Plant Spread: 18 - 24 inches
Leaves: Other: Plants have deep taproots and are best left undisturbed once established. Foliage is slow to emerge in spring. Narrow, lance-shaped leaves are 3-6" long.
Flowers: Showy
Other: Mildly fragrant
Flower Color: White
Bloom Size: Under 1"
Flower Time: Late spring or early summer
Late summer or early fall
Underground structures: Taproot
Suitable Locations: Bog gardening
Uses: Water gardens
Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Toxicity: Leaves are poisonous
Roots are poisonous
Other: Stems exude a toxic milky sap when cut.
Propagation: Seeds: Provide light
Self fertile
Stratify seeds: 3 months at 40 degrees
Suitable for wintersowing
Propagation: Other methods: Cuttings: Root
Pollinators: Moths and Butterflies
Various insects
Containers: Not suitable for containers


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Here's a report of the most popular water garden plants from our database!

(Full article14 comments)
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Posted by Catmint20906 (Maryland - Zone 7a) on Aug 22, 2014 7:42 PM

Swamp Milkweed (Asclepias incarnata 'Ice Ballet') is a larval host plant for the Queen and Monarch butterflies and a key Monarch Way Station plant. It is an excellent source of nectar for late season butterflies and moths, and attracts a variety of pollinators. Swamp Milkweed also has special value to native, bumble, and honey bees, including yellowfaced, sweat, green sweat, small resin, and leafcutter bees.

Swamp Milkweed supports conservation biological control by attracting numerous beneficial insects to the garden, including a variety of wasp species (great black, great golden digger, squareheaded), flies (tachinid, bee, syrphid), and beetles (soldier, longhorn, banded longhorned). Caution should also be used with regard to yellow jackets, a nest-building wasp species which may also be attracted to this plant.

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Posted by Newyorkrita (North Shore, Long Island, NY ) on Sep 29, 2011 5:13 PM

Beautiful white flowered form of Swamp Milkweed. Like the other milkweeds, it is the host plant for the Monarch Butterfly.

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Plant Events from our members
Catmint20906 On June 5, 2015 Bloomed
dkr On June 1, 2014 Obtained plant
MunchkinsMom On June 10, 2016 Bloomed
One stalk is straight up 21" tall, the other stalk is 20" tall but has a serious curve.
MunchkinsMom On April 2, 2016 Transplanted
Kitchen Rock, two stalks--one about 8" tall, one about 1" tall, both leafed out
MunchkinsMom On November 2, 2015 Obtained plant
Dogwooderitternet eBay Dormant
lovesblooms On March 1, 2020 Seeds sown
winter sow
lovesblooms On February 18, 2017 Seeds germinated
lovesblooms On February 4, 2017 Seeds sown
lovesblooms On March 22, 2016 Seeds germinated
lovesblooms On March 5, 2016 Seeds sown
dave On March 16, 2017 Seeds sown
dave On January 29, 2017 Maintenance performed
Placed in moist paper towel in a ziplock bag and placed in the fridge.
christine2 On May 19, 2017 Obtained plant
3 BR
» Post your own event for this plant

Discussion Threads about this plant
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Free Milkweed (Asclepias incarnata) Seeds by GardeningMama Jul 17, 2018 9:27 AM 0
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Does anyone rescue reduced or clearance plants? by keithp2012 Dec 29, 2019 1:43 PM 1,200
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ID Please? by ge1836 Jul 3, 2012 4:53 PM 5
Midwest Weather and everything else by kareoke Sep 24, 2020 8:25 AM 37,476

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