Nephrolepis exaltata 'Bostoniensis'
sword fern 'Bostoniensis'
'Bostoniensis' is an evergreen, frost-tender fern with an upright, spreading habit growing to 90cm tall and wide. The broadly lance-shaped, pinnate fronds grow upright initially before arching and then drooping with age
Ultimate height0.5–1 metres
Time to ultimate height2–5 years
Ultimate spread0.5–1 metres
MoistureMoist but well–drained
Colour & scent
- Partial shade
North–facing or West–facing or East–facing
- Native to the UK
Nephrolepis are rhizomatous, sometimes stoloniferous, evergreen ferns with narrow, pinnately divided fronds, broader and more highly dissected in many cultivars
- Name status
How to grow
Grow indoors or under glass in a multipurpose compost or a mix of 1 part loam, 2 parts sharp sand, and 3 parts leaf mould, in bright filtered light, with moderate to high humidity and good ventilation. During the growing season, water moderately with soft water and apply a half-strength balanced liquid fertiliser monthly. Water sparingly in winter. Fronds can rot if they become too wet
Propagate by spores, sow spores at 21°C as soon as ripe; resulting plants may not come true. Separate rooted runners in late winter or early spring
Suggested planting locations and garden types
- Patio and container plants
Remove any dead fronds
Can suffer from scale insects
May be subject to rot if fronds become too wet
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