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Carex flacca (Blue sedge)

Other names: Glacous sedge, Blue green sedge, Carnation grass, Flabby sedge, Carex glauca

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Species
C. flacca is a compact, dense, clump-forming, rhizomatous, evergreen perennial with linear, arching, blue-green leaves and cylindrical spikes of insignificant, greenish-white flowers in summer.
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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
0.3 m 0.45 m 2-5 years
0 ft 1 ft 2-5 years

Where to grow

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

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Additional plant details

Cultivation

Grow in wet, moist, or moist but well-drained, neutral to alkaline soil in full sun or partial shade. Tolerates standing water up to 5cm deep. Can be grown in full sun in cool summer climates. Evergreen in warm winter climates. Though best with regular moisture, will tolerate moderate drought.

Suggested uses

Ground Cover, Rock, Beds and borders, Cottage/Informal, City, Low Maintenance, Waterside, Garden edging, Bog garden, Woodland

UK hardiness

H7

USDA zones

Zone 5, Zone 6, Zone 7, Zone 8, Zone 9

Sunset zone

4, 5, 6, 7, 8, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 3

WUCOLS

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

Foliage

Evergreen

Habit

Clump-forming, Compact, Arching

Native to

Mediterranean

Drought tolerant

No

Flood tolerant

Yes

Toxicity

Not toxic

Plant care

Pruning

Remove any faded or dead leaves in late winter or early spring.

Propagation methods

Division

Propagation

Divide in spring.

Pests

Aphids

Diseases

Divide and replant in spring

Plant in moist or boggy soil

Plant container grown plants in a sunny postion

Plant in full sun or partial shade (autumn or spring)

Plant in neutral to alkaline soil (autumn or spring)

Plant in moist but well-drained soil (autumn or spring)

Rake out dead leaves from grasses (optional)

Other plants

Plants in this Genus (113)

Carex

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Carex testacea 'Prairie Fire'
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Carex testacea 'Prairie Fire' Orange New Zealand sedge 'Prairie Fire'
Carex comans red-leaved
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Carex comans red-leaved Red New Zealand hair sedge
Carex buchananii 'Viridis'
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Carex buchananii 'Viridis' Leatherleaf sedge 'Viridis'
Carex panicea
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Carex panicea Carnation sedge
Carex siderosticha 'Variegata'
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Carex siderosticha 'Variegata' Variegated creeping broad-leaved sedge
Carex pseudocyperus
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Carex pseudocyperus Cyperus sedge
Carex acutiformis
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Carex acutiformis Swamp sedge
Carex oshimensis 'Everest'
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Carex oshimensis 'Everest' Sedge 'Everest'
Carex tenuiculmis
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Carex tenuiculmis New Zealand hair sedge
Carex dipsacea 'Dark Horse'
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Carex dipsacea 'Dark Horse' Green sedge 'Dark Horse'
Carex lurida
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Carex lurida Sallow sedge
Carex morrowii 'Fisher's Form'
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Carex morrowii 'Fisher's Form' Japanese sedge 'Fisher's Form'
Carex testacea 'Old Gold'
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Carex testacea 'Old Gold' New Zealand sedge 'Old Gold'
Carex caryophyllea 'The Beatles'
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Carex caryophyllea 'The Beatles' Mop head sedge 'The Beatles'
Carex conica 'Snowline'
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Carex conica 'Snowline' Miniature variegated sedge
Carex muskingumensis
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Carex muskingumensis Palm branch sedge
Carex praegracilis
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Carex praegracilis Clustered field sedge
Carex comans bronze-leaved
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Carex comans bronze-leaved Bronze New Zealand hair sedge
Carex 'Milk Chocolate'
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Carex 'Milk Chocolate' Sedge 'Milk Chocolate'
Carex comans 'Frosted Curls'
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Carex comans 'Frosted Curls' New Zealand sedge 'Frosted Curls'
Carex morrowii
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Carex morrowii Japanese sedge
Carex brunnea 'Variegata'
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Carex brunnea 'Variegata' Variegated sedge
Carex buchananii
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Carex buchananii Leatherleaf Sedge
Carex comans
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Carex comans Bronze New Zealand hair sedge
Carex elata 'Aurea'
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Carex elata 'Aurea' Bowles' golden sedge
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Companion plants (0)

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