Western Oak Fern
Gymnocarpium disjunctum
Last reviewed: June 2026
Light
part shade
Water
medium
Size
6"–18" H × 8"–24" W
Bloom
N/A
Native to
CO, ID, MT, OR and 2 more states
Browse plants for this ecoregion
Western oak fern is a delicate, low-growing native fern that forms neat clumps of triangular, lacy fronds. It thrives in partial shade and provides soft textural contrast in woodland gardens and shaded borders. The fronds die back in winter, emerging fresh each spring.
In an HOA neighborhood
Western Oak Fern is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, mid zone.
- Dies back completely in winter leaving bare spots
Wildlife value
As a fern, it doesn't produce flowers for pollinators but provides habitat for small insects and spiders. The dense fronds offer shelter for ground-dwelling creatures and small wildlife.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Western Oak Fern fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.