Overview
Helleborus niger subsp. macranthus is a clump-forming, mounded perennial in the genus Helleborus, part of the Ranunculaceae family, with evergreen or semi-evergreen; leathery, palmately divided, dark green foliage. It typically grows around 0.3 m tall. Helleborus niger subsp. macranthus grows best in partial shade; tolerates full sun in reliably moist soil, and tolerates fertile heavy loam or clay with plenty of humus soils and neutral to alkaline pH. Its UK hardiness is rated H6-H7. It is native to Alps and Central Europe.
About
Helleborus niger subsp. macranthus is a clump-forming perennial notable for its midwinter to early-spring blooms. It produces leathery, palmately divided, dark green leaves and reaches about 0.3 m. Suited to sheltered, partly shaded sites, it flowers January to April. All parts of the plant are poisonous and should be handled with care.
Wikipedia contributors, CC BY-SA 4.0 — Helleborus niger
About the genus
Commonly known as hellebores, the Eurasian genus Helleborus consists of approximately 20 species of herbaceous or evergreen perennial flowering plants in the family Ranunculaceae, within which it gave its name to the tribe of Helleboreae. Many hellebore species are poisonous.
Wikipedia contributors, "Hellebore", CC BY-SA 4.0 — Hellebore
In the garden
Helleborus niger subsp. macranthus is a clump-forming member of the Ranunculaceae native to the Alps and parts of Central Europe. It carries dark green, leathery, palmately divided leaves in a compact mounded habit and produces its season’s flowers from January to April, providing colour when few other perennials are in bloom. Plant it where it receives partial shade on a north, east or west aspect; it will tolerate full sun only if the soil remains reliably moist. Aim for a fertile heavy loam or clay enriched with plenty of humus, on neutral to alkaline ground, with moisture that is steady but not waterlogged. The species prefers a sheltered spot and is rated H6–H7, meaning it is very hardy to fully hardy across most of the UK. At 0.3 m tall it suits the front of a mixed border or a tucked position beside a path where its winter and early-spring flowers can be easily seen. Keep soil moisture even during establishment and avoid siting in exposed, drying positions. Remember that the plant is poisonous; place it away from areas frequented by children or curious pets.
Growing conditions
Best soil and position for Helleborus
- Sunlight
- Partial shade; tolerates full sun in reliably moist soil
- Soil type
- Fertile heavy loam or clay with plenty of humus
- Soil pH
- Neutral to alkaline
- Soil moisture
- Moist but well drained
- Aspect
- North, east or west facing
- Exposure
- Sheltered
- UK hardiness
- H6-H7
Plant details
Helleborus niger subsp. macranthus size, habit and characteristics
- Plant type
- Perennial
- Habit
- Clump-forming, mounded
- Foliage
- Evergreen or semi-evergreen; leathery, palmately divided, dark green
- Height
- 0.3 m
- Native to
- Alps, Central Europe
- Toxicity
- It is a poisonous cottage garden favourite because it flowers in the depths of winter.
Care notes
Pruning and caring for Helleborus niger subsp. macranthus
- Cultivation
- Give them a cool, humus-rich root run under deciduous shrubs, where they get spring light and summer shade. They dislike being moved, so plant well and then leave alone. The single most useful job is removing the old leaves of the hybrid hellebores in midwinter: it exposes flowers that would otherwise be hidden, and strips out the foliage that carries leaf spot.
- Pruning
- Cut away the previous season's leaves of stemless kinds as the flower buds emerge in midwinter. On stemmed species such as H. foetidus and H. argutifolius, remove flowered stems at the base once they fade.
- Propagation
- Divide established clumps after flowering, though they re-establish slowly. Seed sown fresh germinates readily and self-sown seedlings are plentiful, but hybrids will vary from the parent.
- Pest resistance
- Slugs and snails damage emerging buds, and aphids gather on flower stems in spring.
- Disease resistance
- Hellebore leaf spot is common and disfiguring, and removing old foliage in winter is the main control. Hellebore black death, a virus, causes distorted blackened growth and affected plants must be destroyed.
Frequently asked questions
How do I grow Helleborus niger subsp. macranthus?
Give them a cool, humus-rich root run under deciduous shrubs, where they get spring light and summer shade. They dislike being moved, so plant well and then leave alone. The single most useful job is removing the old leaves of the hybrid hellebores in midwinter: it exposes flowers that would otherwise be hidden, and strips out the foliage that carries leaf spot.
Where is the best place to plant Helleborus niger subsp. macranthus?
Helleborus niger subsp. macranthus prefers partial shade; tolerates full sun in reliably moist soil. It suits sheltered positions.
What soil does Helleborus niger subsp. macranthus need?
Helleborus niger subsp. macranthus grows best in fertile heavy loam or clay with plenty of humus soil. It prefers neutral to alkaline soil. Aim for soil that stays moist but well drained.
How do I prune Helleborus niger subsp. macranthus?
Cut away the previous season's leaves of stemless kinds as the flower buds emerge in midwinter. On stemmed species such as H. foetidus and H. argutifolius, remove flowered stems at the base once they fade.
How big does Helleborus niger subsp. macranthus grow?
Helleborus niger subsp. macranthus reaches a height of 0.3 m.
Is Helleborus niger subsp. macranthus hardy in the UK?
Helleborus niger subsp. macranthus has an RHS hardiness rating of H6, meaning it is very hardy, tolerating -20 to -15°C across most of the UK.
How do I propagate Helleborus niger subsp. macranthus?
Divide established clumps after flowering, though they re-establish slowly. Seed sown fresh germinates readily and self-sown seedlings are plentiful, but hybrids will vary from the parent.
Is Helleborus niger subsp. macranthus toxic?
It is a poisonous cottage garden favourite because it flowers in the depths of winter.
More in the Helleborus genus
- Helleborus Gold CollectionHellebore
- Helleborus odorus from KosovoHellebore
- Helleborus purpurascenspurple-flowered Christmas rose
- Helleborus purpurascens 'Pluto'Christmas Rose
- Helleborus x hyb. 'White Spotted'Hellebore
- Helleborus × sterniiStern's hybrid hellebore
- Helleborus colchicusChristmas Rose
- Helleborus x hyb. Ballard's GroupHellebore