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Corkscrew Rush

Juncus effusus (JUN-kus eff-YOO-sus spir-AH-liss)

Family: Juncaceae Unknown Herbaceous (1-3 ft)

Corkscrew rush is an easy-to-grow ornamental form of the common rush ( Juncus effusus ) with interesting, twisted stems. It can grow with 1 to 6 inches of water over the crown and works well in containers of 2 gallons or larger. Corkscrew rush prefers full sun but can tolerate some shade. It requires consistently moist soil, and it grows well in a pot and as a houseplant. Propagation is by division of the rhizomes and self-seeding, which can be difficult to manage. Keeping the plants in pots and sinking potted plants into the ground with the lip above ground can help limit the spread. In zones with warm winters, they can remain evergreen. In cooler climes, the foliage becomes yellow, then brown, and then dies back to the ground. Corkscrew rush has no leaves, but the stems are attractive corkscrews, which are cylindrical, green and smooth. They form a clump 12 to 18 inches high and equally wide. The late summer-blooming flowers are yellowish green to brown in many-flowered cymes with an obovoid capsule following as fruit. This variety is more conducive to being a specimen plant than the straight-stemmed variety and can be a graceful addition to patios or ponds. Diseases, Insect Pests, and Other Plant Problems: No significant problems. More information on Juncus effusus .

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 41 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft) Optimal soil pH Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Herbaceous Perennial; Houseplant; Ornamental Grasses and Sedges; Water Plant
Life cycle
Perennial
USDA zones
5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, 10a, 10b, 11a, 11b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; Loam (Silt); Sand
Soil pH
Neutral (6.0-8.0)
Soil drainage
Moist | Occasional Flooding | Occasionally Wet
Available space
Less than 12 inches; 12 inches-3 feet
NC region
Coastal; Mountains; Piedmont
Mature size
Height: 1 ft. 0 in. - 1 ft. 6 in. | Width: 1 ft. 0 in. - 1 ft. 6 in.
Growth rate
Slow
Maintenance
Low
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Clumping; Erect; Mounding
Foliage
Semi-evergreen
Leaf color
Green
Hairs present
No
Leaf detail
Bladeless green basal sheaths surrounding stems
Flower color
Cream/Tan; White
Flower shape
Irregular
Flower size
< 1 inch
Flower detail
Spikey irregular yellowish-green to brown many-flowered cyme Small scaly flowers from July to September.
Bloom time
Summer
Fruit type
Capsule
Fruit detail
Obovoid
Stem color
Green
Stem detail
Contorted to corkscrew, dark green needle-like stems.
Wildlife & Ecology
Native status
Unknown
Play value
Textural
Food & Medicine
Fruit type
Capsule
Landscape Use
Landscape location
Pond; Riparian
Landscape theme
Children's Garden; Rain Garden; Water Garden
Design feature
Accent; Specimen
Garden tags
#children's garden #water garden #wet soils tolerant #HS302 #riparian #mountains #Piedmont Mountains FACW #Coastal OBL #piedmont #clumping #houseplant #container plant #interiorscape #easy to grow #specimen #marshes #playground plant #boggy sites #perennial grass #perennial #patio #accent #rain garden #wetland
Problems & Resistance
Resistant to
Wet Soil
Propagation
Division

Planted at Hunnicutt

Nobody’s planted this one yet.