Juncus acutus aka Sharp Rush

Juncus acutus is a perennial rush in the Juncaceae family. Its common names include sharp rush and sharp seaside rush. It is native to Britain and parts of southern Europe. Its native range also reaches North Africa and Macaronesia. In the wild, it grows along sandy shores and dune slacks. It also occurs in salt marshes, though less often. These coastal sites reflect its ability to grow in salty soil.

Plants reach about 5 feet [1.5 metres] in height. This makes the rush a tall choice for wet ground. It flowers in June, according to Plants For A Future. Each flower has both male and female organs. Wind carries the pollen, rather than insects or other animals. The supplied species account gives no further flower or fruit details. It also gives no clear details of leaf or stem form.

This rush suits a pond edge or a bog garden. Grow it in moist or wet soil, or shallow water. Plants For A Future describes it as easy to grow. It prefers heavy soil but also accepts sand and loam. It can grow in heavy clay as well. Full sun and light shade both suit it. It accepts mildly acid, neutral and mildly alkaline ground. Its tolerance of salt gives it value in coastal planting. The supplied evidence gives no temperature limit or hardiness zone.

Gardeners can raise new plants from seed or spring division. Sow seed on the compost surface in early spring. Use pots in a cold frame and keep them moist. Move seedlings into their own pots once large enough to handle. Strong young plants can go outside during summer. Keep slower plants until late spring of the next year. Large divisions can go straight into their final planting sites. Pot small divisions first, then plant them after roots develop.

The stems provide material for baskets, mats and roof thatch. These craft uses add to its role in wet gardens. Plants For A Future records no known food or medicinal uses. It gives both uses a rating of zero. That lack of food use does not establish that it is poisonous. The source reports no toxicity records for this species. The supplied evidence gives no species-specific pest or disease details.