Asclepias speciosa (Showy milkweed)

Native, erect hairy perennial found in full to nearly full sun. Rose-purple blooms May to September in well-drained soils of meadows, open areas, roadsides, abandoned farmlands and ditch banks; up to 6,300 ft. in elevation. Forms vigorous colonies from lateral roots, making it good for stabilizing and restoring degraded or disturbed sites. Widely distributed, also the most abundant milkweed in both the Intermountain west and Inland northwest; threatened in Iowa. Shown to attract more beneficial insects to help control crop pests than numerous other natives. All native milkweeds are the larval host plant of the monarch butterfly.

native distribution

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INFORMATION & ATTRIBUTES

Family: Asclepiadaceae

Duration: Perennial

Growth Habit: Forb

Native Status: Native

Growth Form: Single crown

Mature Height: 36 in.

Bloom Color: Rose-purple

Bloom Period: May-September

Annual Precipitation:  in.

Drought Tolerance: Low

Shade Tolerance: Low

Elevation: up to 6,300 ft.

Wetland Indicator Status: FAC

Fire Resistance:

Fire Tolerance: High

Nitrogen Fixation: None

SOIL ADAPTATION

Coarse Texture: Yes

Medium Texture: Yes

Fine Texture: Yes

Salinity Tolerance: None

CaCO3 Tolerance: Medium

pH Range: 5.0-7.0


SEEDING NOTES

Seeds per Pound: 70,300

Seeding Rate:  PLS lbs/acre

Season: Fall

Days to Germination:


VARIETIES & LOCAL ACCESSIONS

None