North America Native Plant

Thickhead Sedge

Botanical name: Carex macloviana

USDA symbol: CAMA9

Life cycle: perennial

Habit: grass

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

Synonyms: Carex festiva Dewey (CAFE6)  âš˜  Carex incondita F.J. Herm. (CAIN33)  âš˜  Carex soperi Raup (CASO5)   

Thickhead Sedge: A Hardy Native for Challenging Garden Spots If you’re looking for a tough, low-maintenance native plant that can handle whatever Mother Nature throws at it, meet thickhead sedge (Carex macloviana). This unassuming little sedge might not win any beauty contests, but it’s the plant equivalent of that reliable ...

Thickhead Sedge: A Hardy Native for Challenging Garden Spots

If you’re looking for a tough, low-maintenance native plant that can handle whatever Mother Nature throws at it, meet thickhead sedge (Carex macloviana). This unassuming little sedge might not win any beauty contests, but it’s the plant equivalent of that reliable friend who’s always there when you need them – hardy, adaptable, and surprisingly useful in the garden.

What Makes Thickhead Sedge Special?

Thickhead sedge is a perennial grass-like plant that belongs to the sedge family. Don’t let the grass-like description fool you into thinking it’s just another lawn alternative – this little powerhouse has some serious credentials. As a true native species, it calls Alaska, Canada, Greenland, and parts of the lower 48 states home, making it one of nature’s most cold-hardy performers.

You might also see this plant listed under its former names, including Carex festiva, Carex incondita, or Carex soperi, but they’re all referring to the same resilient sedge.

Where You’ll Find It Growing Wild

Thickhead sedge has quite the impressive natural range, spanning from Alaska down through western and northern Canada, including Alberta, British Columbia, Manitoba, Quebec, Saskatchewan, Yukon, and the Northwest Territories. In the United States, you can find it in Maine, New Mexico, and Labrador – talk about adaptable!

Why You Might Want This Sedge in Your Garden

Here’s where thickhead sedge really shines – it’s incredibly versatile when it comes to moisture conditions. Depending on your region, this adaptable plant can handle both wetland and non-wetland conditions:

  • In Alaska: Equally comfortable in wet or dry spots
  • In the Arid West, Great Plains, and Western Mountains: Prefers moist areas but can tolerate drier conditions

This flexibility makes it perfect for those tricky garden spots where other plants struggle. Whether you’re dealing with a soggy low spot that dries out in summer or a challenging slope that needs erosion control, thickhead sedge has got you covered.

Garden Design Ideas

While thickhead sedge might not be the showstopper of your garden, it’s an excellent supporting player. Its fine texture and clumping growth habit make it ideal for:

  • Rock gardens and alpine settings
  • Naturalistic plantings and prairie restorations
  • Ground cover in challenging areas
  • Erosion control on slopes
  • Native plant gardens focused on northern species

Growing Thickhead Sedge Successfully

One of the best things about thickhead sedge is that it’s refreshingly low-maintenance. This hardy perennial is extremely cold-tolerant, thriving in USDA zones 1-6 – perfect for gardeners in northern climates who sometimes feel left out of the gardening fun.

The plant adapts well to various growing conditions, from full sun to partial shade, and isn’t picky about soil quality. Once established, it’s quite drought-tolerant, making it a great choice for low-water gardens or areas where you want to reduce maintenance.

Planting and Care Tips

Getting started with thickhead sedge is straightforward:

  • Plant in spring or fall when temperatures are moderate
  • Choose a location with well-draining soil (though it can handle various moisture levels)
  • Space plants according to your coverage goals – they’ll spread naturally over time
  • Water regularly the first growing season to help establish roots
  • After establishment, minimal care is needed – just occasional division if clumps become too large

Wildlife and Ecosystem Benefits

While thickhead sedge might not attract butterflies like a flashy wildflower, it plays an important role in the ecosystem. As a native sedge, it provides seeds for birds and small wildlife, and its root system helps improve soil structure and prevent erosion.

Is Thickhead Sedge Right for Your Garden?

If you’re a gardener who appreciates native plants, enjoys low-maintenance landscaping, or has challenging growing conditions, thickhead sedge could be a perfect fit. It’s especially valuable for northern gardeners looking to create sustainable, regionally appropriate landscapes.

While it may not be the most ornamental choice, thickhead sedge earns its place in the garden through reliability, ecological value, and its ability to thrive where other plants struggle. Sometimes the most humble plants turn out to be the most valuable – and thickhead sedge is definitely one of those unsung garden heroes.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" matching plants to their ideal growing conditions, so they'll thrive with less work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Alaska

FAC

Facultative - Plants with this status can occur in wetlands and non-wetlands

Arid West

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Great Plains

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Western Mountains, Valleys, and Coast

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Thickhead 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 macloviana d'Urv. - thickhead sedge

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