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Osmunda japonica

Asian royal fern

A decidious fern with an erect, ascending, or shortly creeping rhizome. It produces a cluster of green fronds, each up to 150cm tall and 50cm wide. The spore-bearing fertile fronds are more upright and of a bronze hue.

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Size
Ultimate height
1–1.5 metres
Time to ultimate height
5–10 years
Ultimate spread
0.5–1 metres
Growing conditions
Loam
Clay
Moisture
Poorly–drained, Moist but well–drained
pH
Neutral, Acid
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Green
Autumn Green Bronze
Winter
Position
  • Partial shade
Aspect

West–facing or East–facing or North–facing

Exposure
Sheltered
Hardiness
H6
Botanical details
Family
Osmundaceae
Native to the UK
No
Foliage
Deciduous
Habit
Clump forming
Genus

Osmunda are medium-sized to large deciduous ferns, usually from wet places, with erect or arching, pinnate or bipinnate fronds, bearing spores either on modified pinnae or on separate, smaller fronds

Name status

Correct

Plant range
Pakistan to Japan

How to grow

Cultivation

Succeeds in most moist soils, preferring acid conditions and requires a constant supply of water, doing well by ponds, lakes or streams. Plants will tolerate sun so long as there is no shortage of moisture in the soil.

Propagation

Propagate by division or spores

Suggested planting locations and garden types
  • Cottage and informal garden
  • Low Maintenance
Pruning

Remove any dying fronds if required.

Pests

Generally pest-free

Diseases

Generally disease-free

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