Gymnocarpium oyamense
Japanese oak fern
A deciduous fern with long, slender, spreading rhizomes and deeply divided fronds with pale green, scallop-edged segments, the leaf blades held horizontally on wiry, upright stems
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
5–10 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | Green | |||
| Winter |
Position
- Full shade
Aspect
West–facing or North–facing or East–facing
Exposure
Sheltered Hardiness
H5Botanical details
- Family
- Woodsiaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Matforming
- Genus
Gymnocarpium are small deciduous ferns with a slender creeping rhizome, and much-divided, triangular to ovate fronds
- Name status
Correct
How to grow
Cultivation
Grow in neutral to acid, leafy, moist soil, enriched with garden compost, in deep shade. See how to grow ferns for further advice
Propagation
Sow spores at 15°C (59°F) when ripe or divide in spring
Suggested planting locations and garden types
- Cottage and informal garden
- Flower borders and beds
- Underplanting of roses and shrubs
Pruning
Cut back in autumn as fronds fade
Pests
Generally pest-free
Diseases
Generally disease-free
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