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Wool Grass, Woolrush, Marsh Bulrush

Scirpus cyperinus

Family: Cyperaceae (sy-peer-AY-see-ee) (Info)
Genus: Scirpus (SIR-pus) (Info)
Species: cyperinus (sy-per-RY-nus) (Info)



Ponds and Aquatics

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Requires consistently moist soil; do not let dry out between waterings

Very high moisture needs; suitable for bogs and water gardens

Where to Grow:

Unknown - Tell us


4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)


12-15 in. (30-38 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Partial to Full Shade


Unknown - Tell us

Bloom Color:

Pale Green


Bloom Time:



Grown for foliage

Other details:

May be a noxious weed or invasive

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

By dividing the rootball

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Rehoboth Beach, Delaware

Champaign, Illinois

Lisle, Illinois

Chatsworth, New Jersey

Frenchtown, New Jersey

Brooklyn, New York

Downingtown, Pennsylvania

Neenah, Wisconsin

show all

Gardeners' Notes:


On Sep 10, 2015, Rickwebb from Downingtown, PA wrote:

I've seen this native perennial of the Sedge Family (Cyperaceae) in marshes and swamps. It is common east of the Mississippi in the US and southern Canada, and is found in different locations in some of the states farther west. Wetland birds and ducks eat the seed and Canada Geese and Trumpeter Swans can eat the foliage. It makes a good cover and food source for birds and some other wildlife. Some native plant nurseries as Prairie Nursery in central WI, North Creek Nursery in southeast PA, and Blue Moon in southern MN sell the seed and sometimes plants for naturalistic restorations and such. The plant grows during cool weather in spring and fall.