Intermediate
skill rating
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Cyathea medullaris (Black tree fern)
2 hours care
per year
per year
1m
Max height
Max height
0.6m
Max spread
Max spread
10-20 years
To maturity
To maturity
Plant details
Botanical name
Cyathea medullaris
Other names
Black tree fern, Sago fern, Mamaku
Genus
Cyathea Cyathea
Species
C. medullaris - C. medullaris is a tender tree fern with a black, hairy trunk, and long golden green fronds.
Cyathea medullaris is: Evergreen
Habit
Arching
Flower
Insignificant or absent in All seasons
Foliage
Yellow-green, Pale-green in All seasons
How to care
Watch out for
General care
Pruning
Dead or damaged fronds should be removed.
Propagation methods
Division, Spores
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Where to grow
Cyathea medullaris (Black tree fern) will reach a height of 1m and a spread of 0.6m after 10-20 years.
Suggested uses
Architectural, City, Conservatory, Containers, Foliage only, Instant, Sub-Tropical
Cultivation
Plant outdoors in humus-rich, moist, well-drained soil. Water the stem but avoid watering the crown in winter. Will need winter protection in colder areas. Alternatively plant under glass in humid conditions in filtered light.
Soil type
Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Neutral
Light
Partial Shade, Full Shade
Aspect
North, East, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Tender in frost (H3)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Cyathea medullaris
Other names
Black tree fern, Sago fern, Mamaku
Genus
Cyathea Cyathea
Species
C. medullaris - C. medullaris is a tender tree fern with a black, hairy trunk, and long golden green fronds.
Foliage
Evergreen
Habit
Arching
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Colour
Flower
Insignificant or absent in All seasons
Foliage
Yellow-green, Pale-green in All seasons
General care
Pruning
Dead or damaged fronds should be removed.
Propagation methods
Division, Spores
Monthly care advice
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Where to grow
Cyathea medullaris (Black tree fern) will reach a height of 1m and a spread of 0.6m after 10-20 years.
Suggested uses
Architectural, City, Conservatory, Containers, Foliage only, Instant, Sub-Tropical
Cultivation
Plant outdoors in humus-rich, moist, well-drained soil. Water the stem but avoid watering the crown in winter. Will need winter protection in colder areas. Alternatively plant under glass in humid conditions in filtered light.
Soil type
Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Neutral
Light
Partial Shade, Full Shade
Aspect
North, East, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Tender in frost (H3)
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy, Sandy | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Neutral | Tell us... |
| Light: | Partial Shade, Full Shade | Tell us... |
| Aspect: | North, East, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Tender in frost (H3) | Tell us... |
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