North America Native Plant

Weak Stellate Sedge

Botanical name: Carex seorsa

USDA symbol: CASE6

Life cycle: perennial

Habit: grass

Native status: Native to Canada âš˜ Native to the lower 48 states  

Weak Stellate Sedge: A Tiny Native Gem for Wet Gardens If you’re looking for a native plant that’s perfectly content with soggy feet, let me introduce you to weak stellate sedge (Carex seorsa). This humble little sedge might not win any beauty contests, but what it lacks in showiness, it ...

Rare plant alert!

Region: Arkansas

Status: SH: Status is uncertain but is somewhere between the following rankings: Possibly Extinct: Known only from historical occurrences. Still some hope of rediscovery ⚘

Weak Stellate Sedge: A Tiny Native Gem for Wet Gardens

If you’re looking for a native plant that’s perfectly content with soggy feet, let me introduce you to weak stellate sedge (Carex seorsa). This humble little sedge might not win any beauty contests, but what it lacks in showiness, it more than makes up for in ecological value and adaptability to challenging wet conditions.

What Is Weak Stellate Sedge?

Weak stellate sedge is a perennial grass-like plant that belongs to the sedge family. True to its name, this plant produces tiny, star-shaped flower clusters that are quite inconspicuous – you’d have to look closely to notice them! Don’t let the word weak fool you though; this sedge is actually quite resilient in the right conditions.

Where Does It Naturally Grow?

This native sedge has quite an impressive range across eastern North America. You can find it naturally growing from southeastern Canada all the way down to Florida, and from the Atlantic coast west to Arkansas. It calls home to states including Connecticut, Delaware, Florida, Georgia, Indiana, Kentucky, Maryland, Massachusetts, Michigan, Mississippi, New Hampshire, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, and West Virginia, plus Ontario in Canada.

A Word About Rarity

Here’s something important to know: in Arkansas, weak stellate sedge has a rarity status of SH (historically present), meaning it may no longer occur in the state or exists in very limited numbers. If you’re considering adding this plant to your garden, please make sure you source it responsibly from reputable native plant nurseries rather than collecting from wild populations.

Perfect for Wet Spots

Weak stellate sedge is what botanists call a facultative wetland plant across all regions where it grows. In plain English, this means it usually prefers wet conditions but can tolerate some drier periods. This makes it absolutely perfect for:

  • Rain gardens that collect runoff
  • Bog or marsh gardens
  • Areas with poor drainage
  • Naturalistic woodland edges
  • Erosion control on slopes near water

Growing Conditions and Care

The beauty of weak stellate sedge lies in its low-maintenance nature. This adaptable native thrives in USDA hardiness zones 4 through 9, making it suitable for most temperate regions. It prefers moist to wet soils and can handle everything from partial shade to full sun, though it tends to be happiest with some protection from the harshest afternoon rays.

Once established, this sedge requires minimal care. The key is ensuring it gets adequate moisture – think of those naturally soggy spots in your yard where other plants struggle, and you’ve found the perfect home for weak stellate sedge.

Landscape Role and Design Ideas

While weak stellate sedge won’t be the star of your garden show, it’s an excellent supporting player. Use it as:

  • Groundcover in wet, naturalistic areas
  • Filler between showier native wetland plants
  • Erosion control along streams or ponds
  • Texture contrast in native plant combinations

Its grass-like foliage adds a subtle, fine texture that complements bold-leaved plants like native irises or cardinal flower beautifully.

Wildlife and Ecological Benefits

Though weak stellate sedge is wind-pollinated and doesn’t directly attract pollinators like flashier wildflowers do, it still provides valuable ecosystem services. Its root system helps stabilize soil and filter water runoff, while the plant structure offers habitat for small wildlife and insects that form the base of the food web.

Should You Grow It?

If you have a wet area in your garden that needs a native solution, weak stellate sedge could be a great choice. It’s particularly valuable if you’re creating habitat for native ecosystems or working on ecological restoration projects. Just remember to source your plants responsibly, especially given its rarity in some parts of its range.

While it may not provide the dramatic blooms of other native plants, weak stellate sedge offers something equally important: a reliable, low-maintenance solution for challenging wet conditions that supports local ecosystems. Sometimes the most valuable garden plants are the quiet ones that simply do their job well – and that’s exactly what weak stellate sedge does.

Weak Stellate Sedge

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Cyperaceae Juss. - Sedge family

Genus

Carex L. - sedge

Species

Carex seorsa Howe - weak stellate sedge

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