Overview
Blechnum obtusatum is a columnar upright ferns in the genus Blechnum, part of the Blechnaceae family, with evergreen foliage. Blechnum obtusatum grows best in partial shade, and tolerates loam soils and acid pH. Its UK hardiness is rated H1b. Suggested uses include houseplants, patio and container plants, sub-tropical and conservatory and greenhouse.
About
Blechnum obtusatum is a cultivar of the Blechnum genus, which comprises primarily evergreen ferns with upright or spreading rhizomes. This cultivar features a columnar upright habit and evergreen foliage, making it suitable for partial shade conditions, particularly in north-facing or east-facing, sheltered locations. It thrives in moist but well-drained, acid loam soil rich in humus. Hardy to H1b, Blechnum obtusatum is ideal for growing as a houseplant or in conservatories and greenhouses, offering interest during the winter months. Propagation is achieved through spores in summer or by division.
Growing conditions
Best soil and position for Blechnum
- Sunlight
- Partial shade
- Soil type
- Loam
- Soil pH
- Acid
- Soil moisture
- Moist but well-drained
- Aspect
- North-facing or East-facing
- Exposure
- Sheltered
- UK hardiness
- H1b
Plant details
Blechnum obtusatum size, habit and characteristics
- Plant type
- Ferns, Herbaceous Perennial
- Habit
- Columnar upright
- Foliage
- Evergreen
- Suggested uses
- Houseplants, Patio and container plants, Sub-tropical, Conservatory and greenhouse
Care notes
Pruning and caring for Blechnum obtusatum
- Propagation
- Spores in summer, division
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Blechnum obtusatum?
Blechnum obtusatum prefers partial shade. It suits sheltered positions.
What soil does Blechnum obtusatum need?
Blechnum obtusatum grows best in loam soil. It prefers acid soil. Aim for soil that stays moist but well-drained.
Is Blechnum obtusatum hardy in the UK?
Blechnum obtusatum has an RHS hardiness rating of H1b, meaning it needs subtropical warmth of 10–15°C and must be grown under glass in the UK.
How do I propagate Blechnum obtusatum?
Spores in summer, division.
More in the Blechnum genus
- Blechnum ambiguum
- Blechnum filiformethread fern
- Blechnum from Chile
- Blechnum nudumfishbone water fern
- Blechnum patersoniistrap waterfern
- Blechnum penna-marinaalpine water fern
- Blechnum procerum
- Blechnum herminieri