When does great bulrush bloom?

Great bulrush produces its small brownish flower clusters from June through August, typically near the tips of its tall, round stems.

How much water does great bulrush need?

This plant grows best with consistently high moisture, including standing water a few inches deep, though it can also persist in saturated soil with medium moisture.

What light conditions does great bulrush prefer?

Great bulrush grows best in full sun and can tolerate part sun, especially in wetland or pond-edge settings with plenty of moisture.

What does great bulrush look like when it is not flowering?

Outside of bloom, it forms clumps of leafless, rounded green stems that can reach several feet tall, giving it a grasslike or rush like appearance in marshes and shallow ponds.

Is Great Bulrush toxic to livestock?

The USDA PLANTS Database does not flag Great Bulrush as toxic to livestock.

Is Great Bulrush HOA-friendly?

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

Great Bulrush

Name: Pollinator Patch
Author: Pollinator Patch

Schoenoplectus tabernaemontani

Last reviewed: August 2026

Schoenoplectus tabernaemontani, or great bulrush, is a tall wetland sedge that grows in marshes, pond edges, and shallow water and blooms from June through August.

Toxicity unknown

Great Bulrush (Schoenoplectus tabernaemontani) 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 Great Bulrush as toxic to livestock.

Light

full sun

Water

high

Size

36"–96" H × 12"–24" W

Bloom

Jun, Jul, Aug

Native to

AL, AR, AZ, CA and 44 more states

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Great bulrush is a tall, wetland sedge that forms dense clumps of upright green stems topped with brown flower clusters in summer. This native plant thrives in consistently moist to wet soils and can reach up to 8 feet tall in ideal conditions.

Growing Great Bulrush

Grow Great Bulrush in full sun and high water. Mature plants reach 36 to 96 inches tall and spread 12 to 24 inches wide. Expect low maintenance to keep it looking intentional in a front yard.

In an HOA neighborhood

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

Works well in: backyard only.

Very tall and wild appearance inappropriate for formal landscapes
Requires consistently wet conditions that may create drainage concerns
Can spread aggressively in suitable conditions

Wildlife value

The seeds provide food for waterfowl and songbirds, while the dense growth offers nesting sites and cover for wildlife. The flowers attract various insects during the summer blooming period.

Common questions

When does great bulrush bloom?: Great bulrush produces its small brownish flower clusters from June through August, typically near the tips of its tall, round stems.
How much water does great bulrush need?: This plant grows best with consistently high moisture, including standing water a few inches deep, though it can also persist in saturated soil with medium moisture.
What light conditions does great bulrush prefer?: Great bulrush grows best in full sun and can tolerate part sun, especially in wetland or pond-edge settings with plenty of moisture.
What does great bulrush look like when it is not flowering?: Outside of bloom, it forms clumps of leafless, rounded green stems that can reach several feet tall, giving it a grasslike or rush like appearance in marshes and shallow ponds.
Is Great Bulrush toxic to livestock?: The USDA PLANTS Database does not flag Great Bulrush as toxic to livestock.
Is Great Bulrush HOA-friendly?: Great Bulrush 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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