White Milkweed (Asclepias perennis) in the Milkweeds Database

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Common names:
Give a thumbs up White Milkweed
Give a thumbs up Swamp Milkweed
Give a thumbs up Aquatic Milkweed
Give a thumbs up Milkweed

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Partial or Dappled Shade
Water Preferences: Wet
Wet Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Plant Height: 2 to 3 feet
Plant Spread: 12 inches
Leaves: Other: Leaves and stems exude a milky white sap
Flowers: Showy
Flower Color: White
Other: Pink overtones in bud
Flower Size: Under 1"
Flower Time: Late winter and early spring
Late spring or early summer
Late summer or early fall
Inflorescence Type: Umbel
Suitable Locations: Bog gardening
Wildlife Attractant: Bees
Other Beneficial Insects: Wasps, Moths
Resistances: Deer Resistant
Rabbit Resistant
Flood Resistant
Toxicity: Other: All parts of plant are toxic if ingested. Sap may cause contact dermatitis.
Pollinators: Moths and Butterflies
Miscellaneous: Goes Dormant

A perennis blooms covering top of plant

Grow Milkweed and Help Save the Monarch ButterfliesGrow Milkweed and Help Save the Monarch Butterflies
By dave, September 23, 2015

Could the monarchs one day actually go extinct? It's not unheard of. The loss of milkweed is directly related to the loss of monarchs. Let's all grow milkweed and preserve this majestic species of butterfly.

(Full article24 comments)
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Photo gallery:

Plant Log from aspenhill - Lucketts, VA (Zone 7a)
On May 4, 2012 Obtained plant
DG David (greenthumb99) and Pat (ecnalg) - qty 2
Related threads from our forums:
Florida Wildflower Foundation looking for photos Florida Gardening forum
Plant Swap Chat for Spring 2016 Swap Mid Atlantic Gardening forum

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