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Conservatory GreenhouseFerns

Blechnum gibbum
  • RHS AGM

miniature tree fern

An evergreen fern with upright, trunk-like rhizomes and deeply-lobed, bright green fronds usually to about 1m but can reach 2m

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Loam
Moisture
Moist but well–drained
pH
Acid
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Green
Autumn Green
Winter Green
Position
  • Partial shade
Aspect

North–facing or East–facing

Exposure
Sheltered
Hardiness
H1A
Botanical details
Family
Blechnaceae
Native to the UK
No
Foliage
Evergreen
Habit
Columnar upright
Genus

Blechnum are mostly evergreen ferns with erect or creeping rhizomes and simply pinnate, leathery fronds, the fertile ones usually erect, the sterile often spreading

Name status

Correct

Plant range
Fiji

How to grow

Cultivation

Best grown under glass in frost-free conditions in a neutral to acid loam compost with bright filtered or indirect light, a humid atmosphere and good ventilation. Outdoors, for warmer UK counties only, grow in a very sheltered position in moist, humus-rich neutral to acid soil in full to part shade

Propagation

Propagate by spores in summer or propagate by division but may take some time to re-establish

Suggested planting locations and garden types
  • Patio and container plants
  • Sub-tropical
Pruning

Tidy if necessary, removing older fronds

Pests

Generally trouble free

Diseases

Generally trouble free

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