Leymus arenarius

Lyme grass

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Key information

Plant type

Hardy perennial


Dramatic foliage



Skill level


photo by bbc.co.uk/gardening

Plant details

A lovely upright blue-grey grass, this has wide, ribbon-like foliage which spreads by underground rhizomes and forms loose, open clumps. It looks its best when allowed to ramble among other perennial plants in a natural style border where its foliage is combined with flowering plants, and is particularly successful in a modern prairie-style planting scheme where a mixture of fairly vigorous perennials are planted as a tall carpet punctuated by paths. On light soil it can become rather invasive, so needs planting with care.

Family: Poaceae

Genus: Leymus

Species: arenarius

Plant type: Hardy perennial

Foliage colour: Blue-green

Feature: Dramatic foliage

Sun exposure: Full sun

Soil: Well-drained/light, Moist, Sandy

Hardiness: Hardy

Skill level: Beginner

Height: 120cm

Spread: 75cm

Time to divide plants: April to September

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