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Herbaceous Perennial

Cannomois grandis
  • RHS AGM

A vigorous evergreen, perennial of bamboo-like stout clumps rising from rhizomes, with drooping, feathery green to reddish-pink foliage. Male plants have inflorescens of spherical, shiny, plum-brown flowers and female plants have flower heads of large, swollen brown spikelets.

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Size
Ultimate height
4–8 metres
Time to ultimate height
2–5 years
Ultimate spread
4–8 metres
Growing conditions
Loam
Sand
Moisture
Well–drained, Moist but well–drained
pH
Acid, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Brown Green
Summer Green
Autumn Green
Winter Green
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing

Exposure
Sheltered
Hardiness
H4
Botanical details
Family
Restionaceae
Native to the UK
No
Foliage
Evergreen
Habit
Clump forming, Pendulous weeping
Name status

Correct

How to grow

Cultivation

Will grow well in moist but well-drained soil in a sunny position. Keep moist in dry weather. Mulch in winter to protect it from cold weather.

Propagation

Propagate by seed or by division.

Suggested planting locations and garden types
  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Gravel garden
  • Mediterranean climate plants
  • Patio and container plants
  • Low Maintenance
  • Flower borders and beds
  • Wall side borders
Pruning

Remove dead culms as and when needed. Cut down culms to the ground in autumn to stimulate new growth in tired plants.

Pests

May be susceptible to white fly and red spider mite

Diseases

Generally disease-free.

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