North America Native Plant

Clustered Bur-reed

Botanical name: Sparganium glomeratum

USDA symbol: SPGL

Life cycle: perennial

Habit: forb

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

Synonyms: Sparganium erectum L. var. glomeratum Beurling ex Laest. (SPERG3)   

Clustered Bur-Reed: A Unique Native Water Plant for Your Garden If you’re looking to add some architectural flair to your water garden or wetland area, clustered bur-reed (Sparganium glomeratum) might just be the perfect native plant you’ve been searching for. This distinctive perennial brings both visual interest and ecological value ...

Clustered Bur-Reed: A Unique Native Water Plant for Your Garden

If you’re looking to add some architectural flair to your water garden or wetland area, clustered bur-reed (Sparganium glomeratum) might just be the perfect native plant you’ve been searching for. This distinctive perennial brings both visual interest and ecological value to wet landscapes across northern North America.

What is Clustered Bur-Reed?

Clustered bur-reed is a native North American perennial that belongs to the fascinating world of wetland plants. As its name suggests, this plant produces clusters of distinctive spherical, spiky seed heads that look like medieval weapons – hence the bur in its name. Don’t let that intimidate you though; it’s actually quite a charming addition to the right garden setting!

This herbaceous plant (technically called a forb) lacks woody stems but makes up for it with its striking form and hardy nature. It’s also known by the botanical synonym Sparganium erectum var. glomeratum, though you’re more likely to find it sold under its current scientific name.

Where Does Clustered Bur-Reed Grow Naturally?

This hardy native calls much of northern North America home, with natural populations thriving across Canada and the northern United States. You’ll find it growing wild in Alberta, Saskatchewan, Quebec, and Labrador in Canada, as well as in Minnesota and Wisconsin in the U.S.

Why Consider Clustered Bur-Reed for Your Garden?

There are several compelling reasons to include this unique plant in your landscape:

  • Distinctive appearance: The grass-like linear leaves and spherical seed heads create an architectural element that’s hard to replicate with other plants
  • Native plant benefits: Supporting local ecosystems while requiring less maintenance than non-native alternatives
  • Low maintenance: Once established, it thrives with minimal intervention
  • Cold hardy: Perfect for northern gardens in USDA zones 3-7
  • Wetland specialist: Ideal for challenging wet areas where other plants struggle

Perfect Garden Settings

Clustered bur-reed isn’t for every garden – and that’s okay! This specialized plant really shines in specific settings:

  • Water gardens and pond edges
  • Rain gardens and bioswales
  • Naturalized wetland areas
  • Native plant gardens with wet zones
  • Restoration projects for wetland habitats

Its obligate wetland status means it almost always occurs in wetlands naturally, making it an excellent choice for consistently moist to wet areas in your landscape.

Growing Conditions and Care

Success with clustered bur-reed comes down to understanding its specific needs:

Water requirements: This plant loves moisture – we’re talking consistently wet soil or even standing water. If your garden has a perpetually soggy spot that frustrates you, this might be your solution!

Light preferences: Full sun to partial shade works well, with full sun often producing the most robust growth.

Soil needs: Adaptable to various soil types as long as they stay consistently moist to wet.

Climate considerations: Thrives in USDA hardiness zones 3-7, making it an excellent choice for northern gardens.

Planting and Care Tips

Getting started with clustered bur-reed is relatively straightforward:

  • Best planting time: Spring is ideal for establishing new plants
  • Site preparation: Ensure your planting area stays consistently moist or wet
  • Spacing: Allow room for the plant to spread naturally through rhizomes
  • Maintenance: Minimal care needed once established – just ensure adequate moisture
  • Propagation: Can spread naturally through underground rhizomes

Ecological Benefits

While clustered bur-reed is wind-pollinated and doesn’t attract traditional pollinators like bees and butterflies, it plays a valuable role in wetland ecosystems. The plant provides habitat structure for wetland wildlife and contributes to the overall biodiversity of native plant communities.

Its presence in your garden signals a commitment to supporting native ecosystems and can serve as a stepping stone habitat for wildlife moving through the landscape.

Is Clustered Bur-Reed Right for Your Garden?

This unique native plant is perfect for gardeners who:

  • Have consistently wet or boggy areas in their landscape
  • Want to create or enhance water features
  • Are developing native plant gardens
  • Appreciate unusual architectural plant forms
  • Live in northern climates (zones 3-7)

However, it’s not the right choice if you have dry garden conditions or are looking for showy flowers – this plant’s beauty lies in its form and ecological function rather than colorful blooms.

Clustered bur-reed offers gardeners a chance to grow something truly unique while supporting native ecosystems. If you have the right wet conditions and appreciate distinctive plant forms, this hardy northern native might just become one of your favorite garden discoveries!

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

Great Plains

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Midwest

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Northcentral & Northeast

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Clustered Bur-reed

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

Typhales

Family

Sparganiaceae Hanin - Bur-reed family

Genus

Sparganium L. - bur-reed

Species

Sparganium glomeratum (Beurling ex Laest.) L. Neum. - clustered bur-reed

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