North America Native Plant

Eastern Marsh Fern

Botanical name: Thelypteris palustris var. pubescens

USDA symbol: THPAP

Life cycle: perennial

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states âš˜ Native to St. Pierre and Miquelon  

Synonyms: Dryopteris thelypteris auct. non (L.) Sw. (DRTH4)  âš˜  Dryopteris thelypteris (L.) Sw. var. haleana (Fernald) Broun & Weath. (DRTHH)  âš˜  Dryopteris thelypteris (L.) Sw. var. pubescens (G. Lawson) A.R. Prince ex Weath. (DRTHP)  âš˜  Thelypteris confluens (Thunb.) Morton var. pubescens (G. Lawson) Pringle (THCOP)  âš˜  Thelypteris palustris Schott var. haleana Fernald (THPAH)   

Eastern Marsh Fern: A Native Beauty for Your Wet Spots If you’ve got a soggy corner of your yard that seems impossible to landscape, meet your new best friend: the eastern marsh fern (Thelypteris palustris var. pubescens). This graceful native fern might just be the perfect solution for those challenging ...

Eastern Marsh Fern: A Native Beauty for Your Wet Spots

If you’ve got a soggy corner of your yard that seems impossible to landscape, meet your new best friend: the eastern marsh fern (Thelypteris palustris var. pubescens). This graceful native fern might just be the perfect solution for those challenging wet areas where other plants fear to tread.

What Makes Eastern Marsh Fern Special?

This perennial fern is a true North American native, naturally occurring across a vast range from Canada down to Florida and west to the Great Plains. Unlike many garden plants that struggle with wet feet, the eastern marsh fern absolutely thrives in consistently moist to wet conditions – it’s right there in the name!

The eastern marsh fern grows throughout an impressive geographic range, including Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin, and extends into Canadian provinces including Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, and Newfoundland.

Garden Appeal and Design Uses

Don’t let the word marsh fool you into thinking this fern lacks charm. The eastern marsh fern produces delicate, feathery fronds in a fresh, bright green that adds an airy, almost ethereal quality to the landscape. Its graceful texture creates beautiful contrast when planted alongside broader-leafed perennials or bold hostas.

This versatile fern works wonderfully in several garden settings:

  • Woodland gardens where dappled light filters through trees
  • Rain gardens designed to handle runoff
  • Pond or stream margins
  • Bog gardens or naturalized wetland areas
  • As groundcover in consistently moist, shaded areas

Growing Conditions and Care

The eastern marsh fern is refreshingly straightforward to grow, provided you can meet its moisture requirements. This fern thrives in USDA hardiness zones 3-8, making it suitable for most North American gardens.

Light requirements: Partial to full shade (though it can tolerate some morning sun if kept consistently moist)

Soil preferences: Consistently moist to wet soils with acidic to neutral pH. It’s not fussy about soil type as long as it stays damp.

Water needs: This is where eastern marsh fern really shines – it loves what most plants hate. Consistent moisture is essential, and it can even handle periodic flooding.

Planting and Care Tips

Getting your eastern marsh fern established is surprisingly simple:

  • Plant in spring after the last frost date
  • Choose a location that stays consistently moist (think: that spot where water pools after rain)
  • Dig a hole slightly wider than the root ball and plant at the same depth it was growing
  • Apply a layer of organic mulch to help retain moisture
  • Water regularly during the first growing season, though this usually isn’t challenging given the fern’s preferred wet conditions

Once established, eastern marsh fern requires minimal maintenance. Unlike many garden plants, you won’t need to worry about overwatering – in fact, the opposite is more likely to be a problem!

Wildlife and Ecological Benefits

As a native plant, eastern marsh fern supports local ecosystems in ways that non-native alternatives simply can’t match. While ferns don’t produce flowers to attract pollinators directly, they provide important habitat structure and contribute to the complex web of native plant communities that support wildlife.

Why Choose Eastern Marsh Fern?

If you’re dealing with consistently wet conditions in your landscape, eastern marsh fern offers several compelling advantages:

  • Thrives where many other plants struggle or fail
  • Requires minimal care once established
  • Provides beautiful, delicate texture to the garden
  • Supports native ecosystems
  • Hardy across a wide range of climates
  • Won’t become invasive (it’s native!)

Rather than fighting against wet conditions in your landscape, embrace them with eastern marsh fern. This lovely native will transform those challenging soggy spots into graceful, green oases that celebrate the natural beauty of North American wetlands right in your own backyard.

Eastern Marsh Fern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Thelypteridaceae Ching ex Pic. Serm. - Marsh Fern family

Genus

Thelypteris Schmidel - maiden fern

Species

Thelypteris palustris Schott - eastern marsh fern

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA