Juncus effusus

Height: 38-45cm (15-18in)

Water depth: up to 7.5cm (3in)

Features: foliage

Soil: ordinary or poor

Site: sun or partial shade

Type: marginal Juncus is an enormous genus found growing wild in northern-Remispnere, temperate-climate bogs and moorlands hut most are weedy and invasive. A tew varieties, however, merit waterside planting.

Popular species

Juncus effusus is rarely grown, but the form ‘Spiralis’ is popular. It has a sprawling habit and dark green, cylindrical leaves, which vary from tight curls to corkscrews and spirals. Insignificant brown flowers appear in early to mid summer. The plants reach 38-45cm (15-1 8 in) high.


Plant on the margins of a pond in mid to late spring, in sun or light shade. Any soil, even the poorest, is suitable and you can plant in water up to a depth of 7.5cm (3in).

Remove old foliage from time to time and also cut out any straight leaves from ‘Spiralis’, and plain green leaves from ‘Aureostriatus’.

Propagation: Increase by lifting and dividing clumps in mid to late spring, using a sharp knife to sever tough rootstocks. Replant immediately.

Pests and diseases: Trouble free.

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