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.
Common questions
- How much sun does Western Oak Fern need?
- Western Oak Fern grows best in part shade conditions.
- Where is Western Oak Fern native?
- Western Oak Fern (Gymnocarpium disjunctum) is native to CO, ID, MT, OR and 2 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is Western Oak Fern HOA-friendly?
- Western Oak Fern is generally an HOA-friendly choice in the right placement, with low maintenance.
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.
Ready to grow Western Oak Fern? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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