Asclepias Species, Aquatic Milkweed, White Milkweed

Asclepiasperennis

Family
Apocynaceae (a-pos-ih-NAY-see-ee)
Genus
Asclepias (ass-KLE-pee-us)
Species
perennis (per-EN-is)
Synonym
Asclepias lancifolia
Asclepias parviflora
Asclepias parvula
Asclepias pulchella
Sun Exposure
Full Sun
Foliage
Grown for foliage
Evergreen
Height
18-24 in. (45-60 cm)
Spacing
24-36 in. (60-90 cm)
Hardiness
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)
Danger
All parts of plant are poisonous if ingested
Bloom Color
White/Near White
Bloom Time
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Blooms repeatedly
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Orange/Apricot
Where to Grow
Bloom Characteristics
Bloom Size
Other details
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
Non-patented
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
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Bartow, Florida

Green Cove Springs, Florida

Lake Worth, Florida

Lutz, Florida

Abita Springs, Louisiana

Baton Rouge, Louisiana

Ocean Springs, Mississippi

Central Point, Oregon

Berwyn, Pennsylvania

Okatie, South Carolina

Willis, Texas

Leesburg, Virginia

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Gardener's Notes:

4
positives
2
neutrals
0
negative
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N
Abita Springs, LA | July 2020 | positive

Bought a plant at a plant sale last fall. I've seen butterflies, bees, and all manner of other insects on the flowers so it is good for p...Read More

S
Bluffton, SC (Zone 8b) | June 2019 | positive

I have been growing this plant for 5 years. It gets only about 12" tall and has beautiful white flowers. I was desperately looking for a...Read More

J
Lake Worth, FL | March 2019 | positive

So far good, only in ground a month. Ran out of native milkweed for the monarchs and cats; went to my garden store and she stated these w...Read More

F
Josephine, Arlington, TX (Zone 8a) | November 2006 | neutral

Aquatic Milkweed, White Milkweed Asclepias perennis is native to Texas and other States.

W
Willis, TX (Zone 8b) | September 2006 | positive

Attracts butterflies is main positive...needs the soil to remain moist since it has adapted to growth in such an environment. I collected...Read More

L
Grove City, OH (Zone 6a) | January 2003 | neutral

Native to swamps and wetlands. Wide-spread through North America.

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Featured
Striped Albatross
(Appias libythea)
Red-tailed Hawk
(Buteo jamaicensis)