About
Asplenium antiquum 'Osaka' is a tender evergreen fern that typically reaches a height of around 60 cm. It develops rosettes or 'nests' of arching fronds, which are long and flat. The edges of these fronds are notably ruffled and wavy, while the tips are both curved and pointed.
About the genus
Asplenium is a group of evergreen ferns characterized by short, typically upright rhizomes that support a rosette of somewhat leathery fronds. These fronds can vary from simple to pinnate, and may extend to three times pinnate.
Growing conditions
- Sunlight
- Partial shade
- Soil type
- Loam
- Soil pH
- Acid, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H1B
Plant details
- Plant type
- Ferns, Houseplants, Conservatory Greenhouse
- Habit
- Clump forming
- Foliage
- Evergreen
- Height
- 0.5-1 metres
- Spread
- 0.5-1 metres
- Time to full height
- 5-10 years
- Suggested uses
- Houseplants, Sub-tropical
Care notes
- Cultivation
- Grow indoors in bright indirect light, in a container using three parts peat-free multipurpose compost, one part peat-free John Innes No.3, and added horticultural grit, occasionally misting the fronds for moderate humidity. Water to keep the compost moist but not soggy and use a half strength general liquid fertiliser monthly between May and August. See how to grow ferns for further advice
- Pruning
- Dead and damaged fronds may be removed as necessary
- Propagation
- Propagate by division, or propagate by sowing spores as soon as ripe at 21°C
- Pest resistance
- May be susceptible to scale insects
- Disease resistance
- Generally disease-free