Butterfly Milkweed (Asclepias tuberosa)

Butterfly Milkweed (Asclepias tuberosa)

Butterfly Milkweed is the prairie's most brilliant wildflower — its clusters of vivid orange flowers burning like embers in the summer heat, visible from across the garden and irresistible to every butterfly, bee, and hummingbird in the neighborhood. Unlike most milkweeds, it thrives in dry, well-drained soils, making it the milkweed of choice for upland prairie gardens and sunny borders throughout Louisiana.

Botanical Profile

• Family: Apocynaceae (Dogbane family)
• Native Range: Eastern and central North America from Maine to Florida and west to Colorado; native to Louisiana's upland prairies, roadsides, and well-drained open areas
• USDA Hardiness Zones: 3–10
• Mature Size: 1–2 feet tall; grows from a deep taproot
• Bloom Time: May–September
• Sun: Full sun
• Soil: Well-drained, dry to average; drought-tolerant; dislikes wet conditions; deep taproot makes it long-lived

Ecological Role

Butterfly Milkweed is a critical monarch butterfly host plant — its leaves the sole food source for monarch caterpillars — and one of the top nectar plants for adult monarchs, Eastern Tiger Swallowtails, Great Spangled Fritillaries, and dozens of native bee species. Unlike Swamp Milkweed, its dry-soil preference makes it the essential milkweed for upland prairie and garden settings. Its cardenolide compounds make monarch caterpillars toxic to predators, providing chemical protection that persists into adulthood. Indigenous peoples used its root medicinally for pleurisy and lung conditions — earning it the folk name Pleurisy Root.

In the Living Canopy & Understory

Part of the Jardin — The Living Canopy & Understory collection at Big Mamou Enterprises, Butterfly Milkweed is the sunny garden's most brilliant monarch magnet — orange as fire, tough as the Louisiana summer, and essential to the monarch's survival.