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Helictotrichon sempervirens (Blue oat grass)

Other names: Avena sempervirens

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Species
H. sempervirens is a densely tufted, evergreen grass with rigid, blue-green leaves and large, open panicles of small, straw-coloured spikelets on erect stems in early and midsummer.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
1.4 m 0.6 m 2-5 years
4 ft 1 ft 2-5 years

Where to grow

Soil type
  • Chalky
  • Clay
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
  • Well-drained
Soil pH
  • Alkaline
  • Neutral
Sunlight
  • Full Sun
Aspect
  • East
  • West
  • South
  • North
Exposure
  • Exposed
  • Sheltered

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Additional plant details

Cultivation

Grow in poor to somewhat fertile, alkaline to neutral, well-drained soil in full sun.

Suggested uses

Gravel, Rock, Architectural, Beds and borders, Cottage/Informal, City, Low Maintenance

UK hardiness

H5

USDA zones

Zone 4, Zone 5, Zone 6, Zone 7, Zone 8

Sunset zone

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

WUCOLS

North-Central Coastal = Unknown
Central Valley = Unknown
South Coastal = Unknown
South Inland = Unknown
High and Intermediate Desert = Unknown
Low Desert = Unknown

Foliage

Evergreen

Habit

Erect, Clump-forming, Compact, Dense

Native to

Central Europe, Southern Europe

Drought tolerant

No

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

Remove old flower stems and dead foliage in spring.

Propagation methods

Division

Propagation

Divide in spring every 2 or 3 years. Can also be grown from seed in a cold frame at a likewise time.

Pests

Diseases

Rust

Crown rot

Rake out dead leaves from grasses (optional)

Other plants

Plants in this Genus (3)

Helictotrichon

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Helictotrichon sempervirens 'Pendula'
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Helictotrichon sempervirens 'Pendula' Blue oat grass 'Pendula'
Helictotrichon sempervirens
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Helictotrichon sempervirens Blue oat grass
Helictotrichon sempervirens 'Saphirsprudel'
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Helictotrichon sempervirens 'Saphirsprudel' Blue oat grass 'Saphirsprudel'
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Companion plants (0)

Related content

Discuss Helictotrichon sempervirens with other Shoot members

This plant is featured at Chelsea Flower Show 2009

Nicola
790 0
Helictotrichon sempervirens (Blue oat grass) has been used in The HESCO Garden by Leeds City Council for Chelsea Flower Show 2009.
Posted: Friday 15th of May 2009 10:17 AM Last reply: Tuesday 9th of July 2024 05:18 PM
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