Overview
Sphaeropteris excelsa is a columnar upright ferns in the genus Sphaeropteris, part of the Cyatheaceae family, with evergreen foliage. Sphaeropteris excelsa grows best in partial shade, and tolerates loam and sand soils and acid and neutral pH. Its UK hardiness is rated H3. Suggested uses include architectural, city and courtyard gardens, coastal and flower borders and beds.
About
Sphaeropteris excelsa, synonym Cyathea brownii, commonly known as the Norfolk tree fern or smooth tree fern, is probably the largest fern species in the world. It is endemic to Norfolk Island, in the Pacific Ocean near Australia and New Zealand.
Growing conditions
Best soil and position for Sphaeropteris
- Sunlight
- Partial shade
- Soil type
- Loam, Sand
- Soil pH
- Acid, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- North-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
Sphaeropteris excelsa size, habit and characteristics
- Plant type
- Ferns, Conservatory Greenhouse, Houseplants
- Habit
- Columnar upright
- Foliage
- Evergreen
- Suggested uses
- Architectural, City and courtyard gardens, Coastal, Flower borders and beds
Care notes
Pruning and caring for Sphaeropteris excelsa
- Propagation
- Sowing spores as soon as ripe
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Sphaeropteris excelsa?
Sphaeropteris excelsa prefers partial shade. It suits sheltered positions.
What soil does Sphaeropteris excelsa need?
Sphaeropteris excelsa grows best in loam and sand soil. It prefers acid and neutral soil. Aim for soil that stays moist but well-drained.
Is Sphaeropteris excelsa hardy in the UK?
Sphaeropteris excelsa has an RHS hardiness rating of H3, meaning it is half-hardy, tolerating -5 to 1°C, and may need winter protection in colder areas.
How do I propagate Sphaeropteris excelsa?
Sowing spores as soon as ripe.
