whorled Milkweed (Asclepias verticillata)

 

Milkweed is the essential host plant for monarch caterpillars and a nectar source for many pollinators. All of our milkweeds are hardy perennials that return year after year once established.

 

plant profile

Whorled Milkweed is a slender perennial with fine, needle-like leaves and clusters of small white flowers. It blooms later in the season, providing nectar for migrating monarchs.

 

Growing conditions

• Size: 1 to 3 feet tall, 1 to 2 feet wide
• Light: full sun to part sun
• Soil: dry to medium, well-drained
• Water: moderate needs, drought-tolerant once established
• Bloom time: mid to late summer, starting the second year
• Lifecycle: perennial

 

planting instructions

• Plant in spring or fall when temperatures are mild
• Dig a hole slightly wider than the root ball and set the crown level with the soil surface
• Space plants 12–18 inches apart
• Water thoroughly to establish; drought tolerant once mature

 

seasonal growth pattern

• Year 1: Establishes roots; sparse top growth.
• Year 2: Blooms begin and clumps fill out.
• Year 3 and beyond: Reliable summer blooms and steady spread.
• Fall & Winter: Seed pods form; leave stems for overwintering insects.

 

care

Whorled Milkweed can adapt to large containers with good drainage, making it a possible choice for patios, porches, or decks. Use a deep pot, at least 24 inches, with well-drained soil. It grows best in sunny meadows or naturalized plantings, but will still attract pollinators in a container setting.

 

notes

• Does not bloom the first year while roots develop
• An important late-blooming species for monarch migration