Images Depict Mature Plants
Cinnamon Fern
Osmundastrum cinnamomea
Cinnamon Fern is a great choice when you want a native fern with real presence in the shade garden. The green fronds give you that lush woodland look, while the cinnamon-colored fertile fronds add a detail that feels both natural and distinctive. I especially like it in moist shade with hostas, astilbe, heuchera, hellebores, carex, and bleeding hearts, where the fern can add height, texture, and a more established woodland feel.
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Native Fern Texture for Moist Shade Gardens
Tall green fronds with bold woodland texture.
Cinnamon Fern produces large, upright to arching green fronds that bring lush height and soft movement to shaded gardens. The broad, divided fronds create a full woodland look that works beautifully in naturalized beds, shade borders, rain gardens, and under open-canopy trees. Use Cinnamon Fern where homeowners want a native perennial that adds structure, texture, and a cooling green presence in areas that stay moist.
Distinctive cinnamon-colored fertile fronds.
This fern gets its common name from the upright fertile fronds that emerge in spring and quickly turn a warm cinnamon-brown color. These separate spore-bearing fronds rise from the center of the plant, creating a striking contrast against the surrounding green foliage. The effect is especially beautiful in woodland gardens, shaded paths, and naturalized plantings where the fern can be viewed up close during spring and early summer.
A native fern for wet and shaded spaces.
Osmundastrum cinnamomeum is a native fern with a strong association with moist woods, stream banks, boggy ground, shaded ledges, and wetland edges. In the home landscape, it performs best in part shade to full shade with rich, humusy soil that stays consistently moist. It is an excellent choice for rain gardens, low shaded areas, damp woodland borders, and streamside-style plantings where many traditional perennials may struggle.
Deer-resistant foliage with naturalized appeal.
Cinnamon Fern is commonly considered deer-resistant and rabbit-resistant, making it a practical texture plant for shaded landscapes where browsing pressure can be frustrating. It also offers a natural, native look that complements woodland perennials and shade shrubs. Pair it with hostas, astilbe, heuchera, hellebores, bleeding hearts, carex, foamflower, Virginia bluebells, and other moisture-loving shade plants for a layered garden with seasonal depth.
Low maintenance when moisture is consistent.
Cinnamon Fern is easy to grow when planted in the right location, but it does not tolerate dry conditions. It performs best in soil that is consistently moist, organically rich, and cool, especially during summer heat. In ideal moist shade, it can form impressive clumps and may grow larger over time, giving homeowners a long-lived native fern that provides reliable texture and graceful woodland character year after year.
| Hardiness Zone: | 3-9 |
|---|---|
| Mature Height: | 3 to 4 Feet |
| Mature Width: | 2 to 3 Feet |
| Sunlight: | Part shade to full shade; can tolerate more sun only with constant moisture |
| Soil | Rich, humusy, acidic to neutral, consistently moist to wet soil |
| Water Requirements: | Water regularly after planting; prefers steady moisture and should not dry out for long periods |
| Bloom Time / Color | Ferns do not flower; grown for green sterile fronds and cinnamon-brown fertile fronds |
| Foliage | Large green sterile fronds with separate upright cinnamon-brown fertile fronds in spring |
| Ornamental Features | Cinnamon-colored fertile fronds, large arching foliage, native woodland texture, bold clump-forming habit |
| Wildlife Value | Provides shade-garden texture and habitat structure; dense root fiber has ecological and horticultural value |
| Resistance | Deer resistant and rabbit resistant in many landscapes; shade tolerant; tolerant of moist to wet soils |
| Landscape Uses | Woodland gardens, shade borders, rain gardens, moist slopes, stream edges, bog gardens, under open-canopy trees, naturalized plantings, and large shade masses |
How to Care for Cinnamon Fern
Before you buy a Cinnamon Fern Plant, make sure to read about the care instructions that are recommended to keep this plant healthy and thriving.
How should I plant Cinnamon Fern?
Plant Cinnamon Fern in part shade to full shade with rich, humusy soil that stays consistently moist. A woodland bed, shaded rain garden, stream edge, damp slope, or protected area beneath open-canopy trees is ideal. Dig a hole about twice as wide as the root ball and set the crown level with the surrounding soil. Backfill, water deeply, and space plants about 24 to 36 inches apart so the fronds have room to arch naturally and form full clumps.
How often should I water Cinnamon Fern after planting?
Water Cinnamon Fern regularly during the first growing season while the roots establish. Keep the soil consistently moist, especially during warm weather, dry spells, or the first several weeks after planting. Once established, Cinnamon Fern still performs best with steady moisture and should not be allowed to dry out for long periods. If fronds brown, crisp, or collapse during summer, dry soil, hot sun, or wind exposure may be the cause.
When should I fertilize Cinnamon Fern?
Fertilize Cinnamon Fern lightly in spring with compost, leaf mold, or a gentle organic fertilizer if the soil is poor. Rich organic matter is more important than heavy feeding because this fern naturally thrives in woodland and wetland soils. Avoid strong fertilizer applications, which are usually unnecessary and can push soft growth. A yearly layer of compost or shredded leaf mulch helps feed the soil, conserve moisture, and keep the root zone cool.
When and how should I prune Cinnamon Fern?
Prune Cinnamon Fern by removing old, damaged, or collapsed fronds in late fall after frost or in early spring before new fiddleheads emerge. Cut dead fronds close to the base without damaging the crown. During the growing season, remove browned or damaged fronds as needed to keep the planting tidy. Leave healthy green fronds in place as long as possible so the plant can continue storing energy for the next season.
