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Casuarina glauca 'Cousin It' (Desert she-oak 'Cousin It')

Other names: Swamp oak 'Cousin It', Gray sheoak 'Cousin It', Grey sheoak 'Cousin It', Scaly oak 'Cousin It', Longleaf ironwood 'Cousin It'

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Variety or Cultivar
'Cousin It' is a prostrate, mound-forming to trailing, tender, evergreen shrub with whorled, linear, leaf-like, dark green stems. Insignificant flowers are rarely produced.
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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
0.2 m 3 m 5-10 years
0 ft 9 ft 5-10 years

Where to grow

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

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Additional plant details

Cultivation

Grow outdoors in frost-free areas in fertile, moist but well-drained soil in full sun. Tolerates a wide range of soil conditions. Under glass, grow in loam-based compost with added sharp sand in full light. Water freely & feed monthly when in growth.

Suggested uses

Banks and Slopes, Gravel, Ground Cover, Rock, Coastal, Flower Arranging, Mediterranean, Sub-Tropical, Drought Tolerant, Wallside and trellises

UK hardiness

H3

USDA zones

Zone 9, Zone 10, Zone 11

Sunset zone

15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1

WUCOLS

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

Foliage

Evergreen

Habit

Mat-forming, Trailing, Prostrate

Native to

Garden origin

Drought tolerant

Yes

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

Pruning group 1.

Propagation methods

Seed, Semi-ripe cuttings

Propagation

Sow seed at 13-18C in spring.

Pests

Slugs

Snails

Diseases

Leaves will turn chlorotic if soil contains too much lime or phosphate.

Selective pruning only (only if needed)

Plant container grown plants in a sunny sheltered spot

Bring tender indoors if container grown (in cold areas)

Apply a fertiliser container grown plants regularly

Take semi-ripe cuttings

Plant in moist but well-drained soil (spring)

Plant tender plants after danger of frost has passed (late spring, early summer)

Sow seeds in containers with heat (spring)

Other plants

Plants in this Genus (2)

Casuarina

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Casuarina glauca 'Cousin It'
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Casuarina glauca 'Cousin It' Desert she-oak 'Cousin It'
Casuarina glauca 'Greenwave'
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Casuarina glauca 'Greenwave' Swamp she-oak 'Greenwave'
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Companion plants (0)

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