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Phyllostachys bambusoides 'Castillonii'
  • RHS AGM

Castillon bamboo

'Castillonii' is a highly ornamental, robust bamboo with thick golden-yellow canes to 4.5m high, striped green in the grooves, and glossy, dark-green lance-shaped leaves to 15cm in length

Other common names
Marliac's Castillon bamboo
timber bamboo 'Castillonis
Synonyms
Phyllostachys castellionis hort.
Phyllostachys bambusoides castillonensis
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Size
Ultimate height
4–8 metres
Time to ultimate height
5–10 years
Ultimate spread
2.5–4 metres
Growing conditions
Loam
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Yellow Green
Summer Green Yellow Green
Autumn Green Yellow Green
Winter Green Yellow Green
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing

Exposure
Sheltered
Hardiness
H5
Botanical details
Family
Poaceae
Native to the UK
No
Foliage
Evergreen
Habit
Suckering
Genus

Phyllostachys are attractive, large, evergreen bamboos with running rhizomes, although in cool temperate climates may initially behave like clump-forming genera. Canes grooved on alternate sides between the nodes, with usually two leafy branches at each node

Name status

Accepted

How to grow

Cultivation

Grow in fertile, humus-rich, moist but well-drained soil, in full sun or partial shade. Protect from cold drying winds. After flowering cut back hard and feed using a balanced fertiliser. In a container grow in a loam-based compost and feed with a balanced liquid fertiliser on a monthly basis during the growing season. May remain clump-forming in poor or dry soils but can become invasive in warm, moist or favourable conditions; see bamboo control and bamboo cultivation

Propagation

Propagate by division in spring

Suggested planting locations and garden types
  • Architectural
  • Patio and container plants
  • Hedging and screens
Pruning

Remove weak, dead, damaged or spindly stems in spring and thin to show off stems to best effect. Cut out any flowering shoots promptly to discourage more from forming - see bamboo cultivation

Pests

May be susceptible to slugs

Diseases

Generally disease-free

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