Whorled Milkweed

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 delicate native perennial easily recognized by its very narrow leaves arranged in whorls around the stem. It produces clusters of small white to greenish white flowers and naturally grows in prairies, fields, open woodlands, and other sunny areas. Its fine textured foliage gives it a light, airy appearance that sets it apart from broader leaved milkweed species.

 

Growing conditions

  • Size: 1 to 3 feet tall, 1 to 2 feet wide
  • Light: Full sun
  • Soil: Well drained; adaptable to a range of soil types
  • Water: Low to moderate; drought tolerant once established
  • Bloom time: Summer to early fall
  • 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 after planting and regularly while the plant becomes established. Reduce supplemental watering once established.
  • Choose a sunny location with well drained soil.

 

seasonal growth pattern

  • Year 1: Focuses on establishing its root system and top growth; flowering may be limited while the plant becomes established.
  • Year 2: Produces stronger growth and more reliable flowering.
  • Year 3 and beyond: Returns reliably each spring with established growth and seasonal blooms.
  • Fall & Winter: Seed pods mature and split to release wind dispersed seeds. Above ground growth dies back for winter and returns in spring.

 

care

Whorled Milkweed performs best in full sun and well drained soil. Once established, it is drought tolerant and generally requires little supplemental watering. Avoid consistently wet or poorly drained locations.

 

notes

  • Very narrow leaves grow in distinctive whorls around the stems.
  • Fine textured foliage gives the plant a light, airy appearance.
  • Drought tolerant once established.
  • Can gradually spread by underground rhizomes to form small colonies.