Photo by Melody

PlantFiles: Swamp Milkweed
Asclepias incarnata 'Ice Ballet'

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Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Asclepias (ass-KLE-pee-us) (Info)
Species: incarnata (in-kar-NAH-tuh) (Info)
Cultivar: Ice Ballet

7 vendors have this plant for sale.

16 members have or want this plant for trade.

Category:
Perennials

Height:
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

Spacing:
24-36 in. (60-90 cm)

Hardiness:
USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Danger:
All parts of plant are poisonous if ingested

Bloom Color:
White/Near White

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous

Other details:
This plant is attractive to bees, butterflies and/or birds
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

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There are a total of 19 photos.
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Profile:

3 positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive Clary On Jun 22, 2014, Clary from Lewisburg, PA (Zone 6b) wrote:

One of the best choices I've made in my perennial garden. I planted a clump of this (plants from Lazy S) last fall in the back of the garden where the roots are shaded but height is needed. I wanted a nectar plant. Two butterfly bushes failed in that location. I was concerned that the milkweed would not be tall enough but it is already 4 feet tall and blooming (mid-June); I was also concerned about our very wet cold winters and damp ground in that location (which I think contributed to the failure of the buddleias) but the milkweed is absolutely thriving there. The flowers are very white, tending to a shade of creamy green; they are large and stately and compliment other flowers very well; and there are many of the flower heads throughout the clump. I am very happy to have the beautiful flowers that I wanted as well attracting butterflies and all in a native plant. Highly recommended!

Positive mountaindog On Jun 4, 2010, mountaindog from Phoenicia, NY (Zone 5a) wrote:

This is a really beautiful white-flowering NY-native plant that I used to replace some more invasive exotic white-flowering plants. It is a handsome-foliaged, clump-forming plant that blooms late-July until end of summer when a lot of other flowers are done. Looks great planted next to native blue garden phlox. Butterflies do indeed love it, no issues with aphids so far. Does great in my zone 5a garden in full-sun with a good layer of mulch.

Positive Joan On Jul 4, 2006, Joan from Belfield, ND (Zone 4a) wrote:

Milkweed is essential food for the monarch butterfly larva. I have one little struggling plant in a part of the yard that's not taken care of the best, but today I snapped some photos and on this struggling little plant, there were 8 monarch larva feeding. I'm gonna start taking better care of that plant.

Neutral Gabrielle On Jan 16, 2006, Gabrielle from (Zone 5a) wrote:

Swamp Milkweed blooms are very pretty, but it is extremely susceptible to aphids. I plant mine in the back of my yard where it is there for butterflies, but the aphid-attacked plants won't be in full view.

I have read that it is hardy in zones 3-9.

Blooms late June to mid July in my garden.

Regional...

This plant has been said to grow in the following regions:

,
North Little Rock, Arkansas
Hollywood, Florida
Cordele, Georgia
Edwardsville, Illinois
Evanston, Illinois
Machesney Park, Illinois
Mount Prospect, Illinois
Barbourville, Kentucky
Hebron, Kentucky
Brookeville, Maryland
Spencer, Massachusetts
Bellaire, Michigan
Dearborn Heights, Michigan
Pinconning, Michigan
Redford, Michigan
Royal Oak, Michigan
Andover, Minnesota
Warsaw, Missouri
Croton On Hudson, New York
Glen Head, New York
Phoenicia, New York
Belfield, North Dakota
Fargo, North Dakota
Lansdowne, Pennsylvania
Lewisburg, Pennsylvania
Norristown, Pennsylvania
Wilkes Barre, Pennsylvania
Austin, Texas
Fort Worth, Texas
Arlington, Virginia
Leesburg, Virginia
Lexington, Virginia
Bellevue, Washington
Kalama, Washington
Hartford, Wisconsin



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