Overview
Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) is a clump forming herbaceous perennial in the genus Helleborus, part of the Ranunculaceae family, with semi evergreen, evergreen foliage. Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) grows best in partial shade, and tolerates most soils and alkaline and neutral pH. Its UK hardiness is rated H7. Suggested uses include city and courtyard gardens and cottage and informal garden.
About
Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) is a clump-forming herbaceous perennial within the Helleborus genus, known for its rhizomatous or semi-evergreen nature and palmate basal foliage. This cultivar thrives in partial shade and prefers fertile, humus-rich, moist but well-drained soil, tolerating a range of soil types including chalk, clay, loam, and sand with neutral to alkaline pH. It is hardy to UK zone H7 and is suitable for sheltered positions in city, courtyard, cottage, and informal gardens. 'Black Diamond' produces sizable, bowl-shaped blooms in late winter and spring, adding seasonal interest during these months.
Growing conditions
Best soil and position for Helleborus
- Sunlight
- Partial shade
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- West-facing, South-facing, North-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H7
Plant details
Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Clump forming
- Foliage
- Semi evergreen, Evergreen
- Suggested uses
- City and courtyard gardens, Cottage and informal garden
Care notes
Pruning and caring for Helleborus x hybridus 'Black Diamond' (Winter Jewels Series)
- Propagation
- Propagate by seed or by division in autumn
- Pest resistance
- May be susceptible to hellebore aphid, hellebore leaf miner and snails
- Disease resistance
- May be susceptible to hellebore leaf spot and hellebore black death
Frequently asked questions
Where is the best place to plant Helleborus x hybridus 'Black Diamond' (Winter Jewels Series)?
Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) prefers partial shade. It suits sheltered positions.
What soil does Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) need?
Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It prefers alkaline and neutral soil. Aim for soil that stays moist but well-drained.
Is Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) hardy in the UK?
Helleborus x hybridus 'Black Diamond' (Winter Jewels Series) has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
How do I propagate Helleborus x hybridus 'Black Diamond' (Winter Jewels Series)?
Propagate by seed or by division in autumn.
More in the Helleborus genus
- Helleborus argutifoliusholly-leaved hellebore
- Helleborus foetidusstinking hellebore
- Helleborus foetidus 'Chedglow Variegated' (v)
- Helleborus foetidus 'Green Giant'
- Helleborus foetidus 'Red Silver'
- Helleborus foetidus 'Sienna'
- Helleborus lividus subsp. lividus
- Helleborus niger 'Double Fantasy' (d)
