Interrupted Fern
Osmunda claytoniana
Last reviewed: June 2026
Osmunda claytoniana is a native deciduous fern found throughout eastern North America from Maine to Georgia. This interrupted fern thrives in partial shade to shade with consistent moisture.
The USDA PLANTS Database (opens in new tab) does not flag Interrupted Fern as toxic to livestock.
Light
part shade
Water
medium
Size
24"–48" H × 24"–48" W
Bloom
N/A
Native to
AL, AR, CT, DE and 25 more states
Interrupted fern is an elegant native fern with distinctive fertile fronds that have brown spore-bearing segments in the middle, giving it its common name. It forms attractive clumps in woodland gardens and shaded areas, with bright green fronds that turn golden yellow in fall before dying back for winter.
Growing Interrupted Fern
Grow Interrupted Fern in part shade and medium water. Mature plants reach 24 to 48 inches tall and spread 24 to 48 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Interrupted Fern is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, mid zone.
- Goes completely dormant in winter leaving bare ground
Wildlife value
This fern provides shelter and nesting material for small wildlife and birds. The dense fronds offer cover for salamanders, toads, and other woodland creatures.
Common questions
- Where does Osmunda claytoniana naturally grow?
- Interrupted Fern is native to eastern North America, naturally occurring from Maine south to Georgia and west to Minnesota and Missouri. It grows in moist woodlands, stream banks, and shaded slopes.
- What growing conditions does Osmunda claytoniana prefer?
- This fern prefers partial shade to full shade conditions with consistently moist but well-draining soil. It can tolerate some morning sun but performs best with protection from hot afternoon sun.
- Why is it called Interrupted Fern?
- The common name refers to the distinctive fertile pinnae (leaf segments) that appear in the middle of the frond, interrupting the pattern of sterile leaflets above and below them.
- When does Osmunda claytoniana produce spores?
- Interrupted Fern produces spores in late spring to early summer, typically May through July, when the fertile pinnae in the middle of the fronds turn brown and release spores.
- Is Interrupted Fern toxic to livestock?
- The USDA PLANTS Database does not flag Interrupted Fern as toxic to livestock.
- Is Interrupted Fern HOA-friendly?
- Interrupted 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 Interrupted Fern? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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