Description of Juncus effusus var. spiralis (Corkscrew Rush)

Juncus effusus var. spiralis is corkscrew rush, grown for its twisted stems. It’s a strong marginal for pond shelves and bog gardens, and it gives you year-round structure with a fun shape that stands out in simple planting.

Appearance

It forms clumps of upright, curly green stems. In summer it can make small brownish flowers, but the stems are the main feature. Height is usually 30 to 60cm. It stays neat and does not flop.

Care Guide

It likes wet soil and shallow water. It is very forgiving as long as it does not dry out completely.

Sun: Full sun to part shade.
Soil: Wet soil or aquatic compost in a basket.
Water: Boggy ground to shallow water over the basket.
Tidy up: Remove dead stems in spring to keep clumps clean.
Division: Split in spring if clumps get crowded.

If stems lose curl from shade or stress, improving light and steady moisture usually brings better new growth.

Suitability for Bog Garden

This suits bog gardens as a front to mid plant, especially near paths where you can appreciate the curly shape. It is also great in pots sunk into the bog.

It pairs well with flat-leaved plants like irises and hostas, which makes the curls stand out more.

FAQ

Can Juncus effusus var. spiralis grow in water?
Yes. It grows well in shallow water and saturated soil.

Is corkscrew rush evergreen?
It often stays green for much of the year, though growth slows in winter.

How tall does it get?
Usually 30 to 60cm.

When should I tidy it?
Spring is ideal. Remove dead or brown stems so new growth shows clearly.