JUNCUS filiformis Spiralis (Corkscrew Rush) Corkscrew Rush is an easy to grow ornamental rush form of Juncus effusus with interesting, twisted stems. This wetland perennial grass is a rush or sedge found in bogs, marshes, and swamps and is native over large portions of temperate climates of the world. Varieties can be found throughout the United States except for South Dakota, Wyoming, and Utah.
‘Spiralis has no leaves, but the stems are attractive, corkscrews which are both upright and prostrate, cylindrical, green, and smooth. They grow into a mass to form a clump 12 – 18 inches in height and equal spread. The late summer-blooming flowers are yellowish green to brown.
It can grow in 1 to 6 inches of water and works well in containers of 2 gallons or larger. They prefer full sun but can tolerate some shade and require consistently moist soil. Spiralis can be grown as a houseplant as well.
A Northern Sunset Grass, it prefers rich, moist to wet soil in full sun to part shade.
(Image courtesy of Van Bloem)