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Blue oat grass

Helictotrichon sempervirens

Blue oat grass
Photo: Sten Porse, CC BY-SA 3.0

Blue oat grass is a clump-forming evergreen perennial grass with pale blue-green arching foliage, popular as an ornamental in gardens. It thrives in full sun and well-drained soil, and dislikes wet, heavy conditions.

Family
Poaceae (Grass family)
Grows as
Grass, Perennial
Light
Full sun, Part shade
Water
Water deeply but infrequently; let the soil dry out between waterings, and avoid soggy soil.
Soil
Well-drained, poor to average soil; tolerates lean and sandy or chalky ground.
Temperature
Hardy to about -20 °C; protect young plants in very cold, wet winters.
How easy
Easy
Native range
SE. France to Italy
Climate
temperate

About

Helictotrichon sempervirens, the blue oat grass, is a species of flowering plant in the true grass family, Poaceae, native to central and southwest European grasslands. It is a bunchgrass often used as an ornamental grass in garden design and landscaping.

The foliage is pale green with a hint of blue. It grows in an arching shape, up to 140 cm (55 in) tall by 60 cm (24 in) wide. The grass blooms with pale blue-green flowers in May to August. The plant is an evergreen perennial, although with summer drought stress semi-dormancy occurs. The Latin name sempervirens literally means "immortal" but in botany means "evergreen".

Text excerpted from the Wikipedia article Helictotrichon sempervirens by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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