Cinnamon Fern

Cinnamon Fern 

Osmundastrum cinnamomeum

A bold and ancient native fern that brings strong structure and texture to wet landscapes. Known for its striking cinnamon-colored fertile fronds, this species stands out in any shaded, moisture-rich setting.

In spring, bright green sterile fronds unfurl in wide arching clumps, while upright fertile fronds emerge from the center, quickly turning a rich cinnamon brown as they release spores—creating that signature look.

A Wetland Classic with Ancient Roots

Cinnamon Fern is one of the oldest fern lineages on Earth, thriving in environments that mirror its prehistoric origins. It’s a powerhouse plant for low-lying, waterlogged areas where many species simply won’t survive.

Its presence signals healthy, intact wetland systems and adds depth and resilience to restoration plantings.

A Plant of Swamps, Marsh Edges, and Moist Forests

Naturally found in swamps, bog margins, wet meadows, and shaded woodland depressions, Cinnamon Fern prefers consistently moist to saturated soils. It performs best in partial to full shade but can tolerate some sun if soil moisture is reliable.

Its dense clumping growth provides cover for amphibians, insects, and small wildlife, making it an important contributor to wetland biodiversity.

Growing Information

Height: 2–5 ft
Spread: 3–6 ft
Light: Part shade to full shade
Soil: Moist to wet, acidic, organic-rich soils
Hardiness: Zone 3–7
Growth Rate: Moderate

Best planted in rain gardens, wetland restorations, shaded low areas, and along ponds or streams.

Ecological Importance

Cinnamon Fern:

Provides shelter for amphibians and small wildlife
Enhances wetland structure and biodiversity
Stabilizes soil in saturated environments
Contributes to healthy, functioning ecosystems

Associated Wetland & Woodland Species

Common companions in natural plant communities include:

• Marginal Wood Fern (Dryopteris marginalis)
• Jack-in-the-Pulpit (Arisaema triphyllum)

Planting these species together helps recreate resilient woodland-wetland transition zones that support biodiversity and layered habitat structure.

Planting to Protect
Restoring to Thrive 🌱
Origin Native Plants 🌱

5 inch pots