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Aquatic Milkweed, White Milkweed
Asclepias perennis

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Asclepias (ass-KLE-pee-us) (Info)
Species: perennis (per-EN-is) (Info)
Synonym:Asclepias lancifolia
Synonym:Asclepias parviflora
Synonym:Asclepias parvula
Synonym:Asclepias pulchella

Category:

Perennials

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)

Sun Exposure:

Full Sun

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

Foliage:

Grown for foliage

Evergreen

Bronze-Green

Other details:

Average Water Needs; Water regularly; do not overwater

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:

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 has been said to grow in the following regions:

Bartow, Florida

Green Cove Springs, Florida

Lutz, Florida

Ocean Springs, Mississippi

Willis, Texas

Leesburg, Virginia

show all

Gardeners' Notes:

1
positive
2
neutrals
0
negatives
RatingContent
Neutral

On Nov 30, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:

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

Positive

On Sep 12, 2006, WillisTxGarden from Willis, TX (Zone 8b) wrote:

Attracts butterflies is main positive...needs the soil to remain moist since it has adapted to growth in such an environment. I collected my seeds from a plant growing in some wetlands near the Sabine River in Texas.

Neutral

On Jan 29, 2003, lupinelover from Grove City, OH (Zone 6a) wrote:

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