pickup icon

Close-up of the purplish flower of Field Cluster-Lily or Ookaw (Dichelostemma congestum). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
Swallowtail butterfly perched on the purplish flower of Field Cluster-Lily or Ookaw (Dichelostemma congestum). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.

Ookow (Field Cluster Lily)

Regular price
Sale price
Unit price
per 

Dichelostemma congestum


Going by several common names; Ookaw, Field Cluster-Lily or Northern Saitas is a fast-growing, delicate wildflower that adds splashes of blue to well-draining sunny areas. Its sparse foliage fits perfectly in dry perennial beds and meadowscapes, where it goes virtually unnoticed until it’s globe-shaped clusters of bluish-purple flowers seem to suddenly appear, suspended from purple-veined bracts, cheerfully announcing summer. 

  • Plant type/canopy layer: deciduous perennial herbaceous plant/ground layer
  • Size at maturity: 0-2' high, 0-1' wide
  • Light requirements: full sun, part sun / part shade
  • Moisture requirements: dry to moist, well-drained soil
  • Bloom Time: May - August
  • Growth rate/ease: fast growth rate, easy to grow
  • Wildlife support: nectar source for adult butterflies, native bees, and other insect pollinators; attracts and supports hummingbirds
  • Native habitat/range: Common in meadows, open rocky areas, and open forests throughout western Oregon, especially in the Cascades and east Cascades, up to 1600 meters. Portland Plant List - yes.  
  • Special features & uses: attracts and supports hummingbirds, pollinator gardens and wildflower meadows

Gardening with Cluster Lily: Plant in multiples, among your dry meadowscapes, pollinator gardens, rock gardens and other perennial beds to add splashes of spring and early summer color.


Photo Credit 1: "Ookow Dichelostemma congestum" by loarie is licensed under CC BY 2.0

Photo Credit 2:  "Pale Swallowtail on Forktooth Ookow (Dichelostemma congestum) 2014-05-31 (7)" by Don Henise is licensed under CC BY 2.0