When does American bur-reed bloom?

American bur-reed typically flowers from June through August, producing small round clusters of male and female flowers on the same stalk.

What pollinates American bur-reed?

Bees and beetles visit the flowers, along with wind that helps move pollen between the separate male and female flower clusters.

What growing conditions does American bur-reed need?

It needs consistently wet to saturated soil or shallow standing water, such as pond edges, marsh margins and slow moving stream banks.

How much sun does American bur-reed require?

It grows best in full sun but can tolerate partial shade along wooded stream banks and pond margins.

Is American Bur-reed toxic to livestock?

The USDA PLANTS Database does not flag American Bur-reed as toxic to livestock.

Is American Bur-reed HOA-friendly?

American Bur-reed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

American Bur-reed

Name: Pollinator Patch
Author: Pollinator Patch

Sparganium americanum

Last reviewed: August 2026

American bur-reed is a wetland forb that blooms June through August with spiky, ball shaped flower clusters visited by bees and beetles. It thrives in shallow ponds, marshes and slow streams with consistently wet soil.

Toxicity unknown

American Bur-reed (Sparganium americanum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

The USDA PLANTS Database (opens in new tab) does not flag American Bur-reed as toxic to livestock.

Light

full sun

Water

high

Size

12"–48" H × 12"–24" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, CT, DE and 30 more states

Pollinators

bees, beetles

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American bur-reed is an aquatic or semi-aquatic native plant that thrives in consistently wet conditions like pond edges, rain gardens, and bog areas. It produces distinctive spherical flower clusters in summer and has long, narrow leaves that emerge from the water or wet soil. This plant requires constant moisture and is best suited for water features or very wet garden areas.

Growing American Bur-reed

Grow American Bur-reed in full sun and high water. Mature plants reach 12 to 48 inches tall and spread 12 to 24 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

American Bur-reed takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Requires boggy conditions that look unkempt in typical yards
Aquatic appearance seems out of place in standard landscaping
Can spread aggressively in wet areas

Wildlife value

The summer flowers attract bees and beetles, while the seeds provide food for waterfowl and marsh birds. The plant also offers habitat for aquatic insects and amphibians in wet garden areas.

Common questions

When does American bur-reed bloom?: American bur-reed typically flowers from June through August, producing small round clusters of male and female flowers on the same stalk.
What pollinates American bur-reed?: Bees and beetles visit the flowers, along with wind that helps move pollen between the separate male and female flower clusters.
What growing conditions does American bur-reed need?: It needs consistently wet to saturated soil or shallow standing water, such as pond edges, marsh margins and slow moving stream banks.
How much sun does American bur-reed require?: It grows best in full sun but can tolerate partial shade along wooded stream banks and pond margins.
Is American Bur-reed toxic to livestock?: The USDA PLANTS Database does not flag American Bur-reed as toxic to livestock.
Is American Bur-reed HOA-friendly?: American Bur-reed takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

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