Twelve Native Milkweeds for Monarchs

The monarch butterfly population in North America has plummeted by over 90% in just the last 20 years. Destruction of America’s grasslands ecosystems, commercial agricultural practices and even conventional gardening have all contributed to the precipitous decline of this iconic species. National Wildlife Federation has launched a comprehensive campaign to help save the monarch, and there are many ways you can get involved.

One of the biggest factors in monarch decline is the increasing scarcity of its only caterpillar host plant: milkweed. Without milkweed, monarchs can’t successfully reproduce and the species declines. By planting milkweed in your own garden, landscape and throughout your community, you can help reverse the fortune of these beautiful insects.

Meet twelve of the most ornamental milkweeds native to different parts of the country. Make it a goal to include a few plants of at least one native milkweed type to help the monarchs.

Common Milkweed (Asclepias syriaca)

Native Range: AL , AR , CT , DC , DE , GA , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , MT , NC , ND , NE , NH , NJ , NY , OH , OK , OR , PA , RI , SC , SD , TN , TX , VA , VT , WI , WV

Description: This tall perennial has large balls of pink or purplish flowers that have an attractive odor. The flowers bloom from June to August.

Growing Conditions: Shade intolerant, needs lots of sunlight, moist soil

Plant Size:  Usually 3-5 feet (90-150 cm), sometimes reaching 8 feet (240 cm) in ditches and gardens

Butterflyweed (Asclepias tuberosa)

Native Range: AL , AR , AZ , CA , CO , CT , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , NE , NH , NJ , NM , NY , OH , OK , PA , RI , SC , SD , TN , TX , UT , VA , VT , WI , WV

Description:  Sometimes called Orange Milkweed, this perennial has large, flat-topped clusters of yellow-orange or bright-orange flowers and blooms May to September.

Growing Conditions: Needs sunlight, drought tolerant, dry or moist soil

Plant Size:  1-2 ft (30-60 cm)

Swamp Milkweed (Asclepias incarnata

Native Range: AL , AR , CO , CT , DC , DE , FL , GA , IA , ID , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MT , NC , ND , NE , NH , NJ , NM , NV , NY , OH , OK , PA , RI , SC , SD , TN , TX , UT , VA , VT , WI , WV , WY

Description: Also known as Pink Milkweed, this perennial has large blossoms composed of small, rose-purple flowers. The deep pink flowers are clustered at the top of a tall, branching stem and bloom June to October.

Growing Conditions: Needs lots of water, shade tolerant, moist to wet soil

Plant Size: 2-5 ft (60-152 cm)

Antelope-horns Milkweed (Asclepias asperula)

Native Range: AZ , CA , CO , ID , KS , NE , NM , NV , OK , TX , UT

Description: Also known as Spider Milkweed, this perennial is clump-forming with stems that are densely covered with minute hairs. As the green seed pods grow, they curve to resemble antelope horns. It has pale, greenish-yellow flowers, tinged maroon that bloom March to October.

Growing Conditions: Needs sunlight, dry or moist soil, medium water use

Plant Size: 1-2 ft (30-60 cm) tall

Purple Milkweed (Asclepias purpurascens

Native Range: AR , CT , DC , DE , GA , IA , IL , IN , KS , KY , LA , MA , MD , MI , MN , MO , MS , NC , NE , NH , NJ , NY , OH , OK , PA , RI , SD , TN , TX , VA , WI , WV

Description: The milky juice from this perennial is known to remove warts. The flowers are deep magenta red and bloom May to July.

Growing Conditions: Needs sunlight and dry soil

Plant Size: 2-4 ft (61 to 122 cm)

Showy Milkweed (Asclepias speciosa

Native Range: AZ , CA , CO , IA , ID , IL , KS , MI , MN , MT , ND , NE , NM , NV , OK , OR , SD , TX , UT , WA , WI , WY

Description: This perennial has large, oval, blue-green leaves and spherical clusters of rose-colored flowers. The flowers occur at the top of the stem and on stalks from leaf axils and bloom May to September.

Growing Conditions: Shade intolerant, needs sunlight, medium water use, moist soil

Plant Size: Generally 1 ½ – 3 ft (46 – 91 cm) but can reach 6 ft (183 cm) under favorable conditions

California Milkweed (Asclepias californica)

Native Range: Central and southern California

Description: This perennial is a white-woolly plant with milky sap and deep purple flowers. It blooms May to July.

Growing Conditions: Drought tolerant, dry slopes

Plant Size: Maximum height 3 ft (91 cm)

White milkweed (Asclepias variegata)

Native Range: AL , AR , CT , DC , DE , FL , GA , IL , IN , KY , LA , MD , MO , MS , NC , NJ , NY , OH , OK , PA , SC , TN , TX , VA , WV

Description: This perennial has small white flowers with purplish centers crowded into round, terminal clusters that resemble snowballs and blooms May to September.

Growing Conditions: Low water use, dry soil, moderately shade tolerant

Plant Size:  1-3 ft (30- 91 cm)

Whorled milkweed (Asclepias verticillata)

Native Range: AL , AR , AZ , CT , DC , DE , FL , GA , IA , IL , IN , KS , KY , LA , MA , MD , MI , MN , MO , MS , MT , NC , ND , NE , NJ , NM , NY , OH , OK , PA , RI , SC , SD , TN , TX , VA , VT , WI , WV , WY

Description: This single-stemmed perennial has narrow, linear leaves whorled along the stem. Small, greenish-white flowers occur in flat-topped clusters on the upper part of the stem and bloom May to September.

Growing Conditions: Low water use, moderately shade tolerant, dry soil

Plant Size: 1-3 ft (30- 91 cm)

Mexican Whorled Milkweed (Asclepias fascicularis)

Native Range: CA , ID , NV , OR , UT , WA

Description: Also known as Narrowleaf milkweed, this perennial has narrow, whorled leaves with clusters of greenish-white flowers, often tinged with purple and blooms June to September.

Growing Conditions: Needs sunlight, drought tolerant, dry to moist soils

Plant Size: 1-2½ ft (30-76 cm)

Desert Milkweed (Asclepias erosa)

Native Range: AZ , CA , NV , UT

Description: Desert milkweed has white to yellow flowers and a green to yellow stem and blooms April to October. Identification is somewhat difficult because its leaves vary from mostly smooth to covered with fine cream-colored hair.

Growing Conditions: Best grown in deserts or desert conditions with sandy soils, needs sunlight, dry soils, not shade tolerant

Plant Size: 1-3 ft (30- 91 cm)

Green Milkweed (Asclepias viridis)

Native Range: AL , AR , FL , GA , IL , IN , KS , KY , LA , MO , MS , NE , OH , OK , SC , TN , TX , WV

Description: Also known as Green Antelopehorn Milkweed, this perennial has white flowers – mostly one per plant and lacks the “horns” seen on Antelopehorn Milkwed. These milkweeds bloom from May to August.

Growing Conditions: Needs sunlight, cold and heat tolerant, moist soil, low water use

Plant Size: Matures to 4 ft (122 cm) in height

Milkweed Resources

Now that you’ve met some milkweeds, head over to the National Wildlife Federation’s Milkweed Resources page to learn about more milkweed species and where you can find milkweed for your garden! Also stay tuned on how to become a Butterfly Hero this March to receive a free pack of milkweed or nectar plant seeds to get your monarch garden started.

 

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