Monarch Butterfly

- Milkweed and - Nectar Plants native to Arizona
 Antelope-horns Milkweed 
(Asclepias asperula)

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

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 Butterflyweed 
(Asclepias tuberosa)

Host plant for monarch caterpillars and excellent nectar plant for adults. Very showy flowers. Prefers dry soils and full sun.

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)

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 Showy Milkweed 
(Asclepias speciosa )

Monarch caterpillar host plant.

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

This species is closely related to the Common milkweed, A. syriaca, with which it sometimes hybridizes at the eastern limits of its distribution. These species are similar in appearance and growth form (tall and robust), but can be distinguished by the layer of fine white hairs on A. speciosa and flowers that look like small crowns. Unlike A. syriaca, A. speciosa does not form large clones.

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 Whorled milkweed
(Asclepias verticillata)

Monarch caterpillar host plant and exceptional nectar plant. This small milkweed plant is great for landscaping. Dry soils.

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)

Because of its toxicity to livestock, this plant is considered a weed in range areas.

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