Close-up of the showy white flower of Mountain or Large Boykinia (Boykinia major). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
Close-up of the showy white flower of Mountain or Large Boykinia (Boykinia major). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
Close-up of the bright green, saw-toothed leaf of Mountain or Large Boykinia (Boykinia major). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.

Mountain Boykinia

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Boykinia major

Mountain or Large Boykinia will be one of the most cheerful in your shady woodland garden. It boasts dense clusters of white-petaled flowers with bright yellow centers that have an impressively long bloom time, appearing in early summer and happily sticking around until fall. Its uniquely saw-toothed leaves are exceptionally broad, reaching up to eight inches, and provide a luscious groundcover if planted in multiples. 

  • Plant type/canopy layer: deciduous herbaceous perennial plant
  • Size at maturity: 0-4' high, 1-2' wide
  • Light requirements: partly shady to full shade
  • Moisture requirements: moist soil, needs supplemental summer water in dry areas
  • Bloom time: June to September
  • Growth rate/ease: grows quickly, easy to grow
  • Wildlife support: attracts and supports bees, other insect pollinators, beneficial insects and pest eating insects
  • Native habitat/range: locally common in meadows and moist riverbanks throughout most of western OR and northwestern CA. Portland Plant List - no.
  • Special features & uses: pollinator garden, shady rain garden, woodland garden, pollinator favorite 

Gardening with Mountain Boykinia:  This adorable plant will thrive in most-to-fully shady areas with consistently moist soil - such as those with lots of organic material, leaf litter and companion plants that can help keep it moist in summer. Or be prepared to give it occasional water during our seasonal drought. To create a groundcover effect that is most beneficial to pollinators, be sure to plant many individual plants in continuous drifts.

Photo Credit 1: "P20130705-0021—Boykinia major—RPBG" by John Rusk is licensed under CC BY 2.0

Photo Credits 2 & 3: Seven Oaks Natives