Juncus Effusus 'Spiralis' (Corkscrew Rush)

Corkscrew Rush

Juncus effusus ‘Spiralis’, commonly known as Corkscrew Rush, is a unique, clump-forming rush valued for its upright, twisting, spiral stems that add architectural interest. Smooth, cylindrical green stems emerge in spring and persist through the growing season, maintaining their curly form into winter in mild climates, while small, inconspicuous brown flower clusters appear along the stems in summer. Its unusual structure makes it a standout in containers and water features.

Type: Perennial rush (grass-like)

Mature Size:
Width: 18–24 in
Height: 12–18 in
(10-year size: slowly expanding clumps)

USDA Zones: 4a–9b
Form: Upright, clump-forming with twisted, spiral stems
Light: Full sun to partial shade
Soil: Moist to wet soils; tolerates standing water
Water: High; requires consistently moist to wet conditions

Wildlife: Provides cover; supports beneficial insects


Features & Landscape Uses


Unique spiral stems for architectural interest



Excellent for containers, water gardens, and pond edges



Adds texture to mixed plantings



Works well in modern and naturalistic designs




Care
Keep soil consistently moist—do not allow to dry out. Can be grown in containers, rain gardens, or shallow water. Cut back in early spring to refresh growth. Divide every few years to maintain vigor. Protect from extreme winter conditions in colder climates.

Plant type

Ornamental Grass

Height

12-18''

Width

18-24"

Hardiness zones

4–9

Sunlight

Full Sun, Partial Shade

Leaf color

Green

Fall color

Green

Soil

Moist well-drained, Wet Area

Landscape use

Container

Shape

Clump, Upright

Drought tolerant

No