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Helleborus niger - Christmas Rose (seeds)

Helleborus niger
Christmas Rose, Black Hellebore

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This plant carries a 6 months recovery warranty

More information

This is the species of this deciduous perennial plant with winter flowering, from which many hybrids are derived. It forms a clump of large, flexible leaves from which emerge, from December to March, white cup-shaped flowers that evolve towards green to pink-purple hues at the end of flowering. Its deciduous foliage renews itself before the old leaves disappear. Grow in partial shade in a well-drained, fertile, and lime-rich soil. Once established, it requires little intervention and gradually expands, beautifying your garden year after year.
Flower size
5 cm
Height at maturity
30 cm
Exposure
Sun, Partial shade
Germination time (days)
90 days
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Sowing period February to March
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Flowering time January to March, December
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Description

The Helleborus niger is the original botanical species of Christmas Rose or Black Hellebore. It is a robust perennial plant, with a long lifespan and exclusively prefers limestone soil. It forms a clump of large flexible leaves from which emerge simple white cup-shaped flowers in winter for several weeks, taking on green to pink-purple hues towards the end of flowering. For optimal growth, plant the Helleborus niger in partial shade in well-drained, fertile soil. This plant grows slowly but steadily, offering more flowers each year and tolerating root competition.

Native to Western and Central Europe, from Germany to Slovenia through Austria, Switzerland, and Italy, the Helleborus niger is a perennial plant of the Ranunculaceae family that readily hybridizes with other species like Helleborus orientalis or H.argutifolius, producing charming and easy-to-cultivate hybrids from random seedlings. The Black Hellebore is a very robust plant, long-lived and highly cold-resistant, adapting to most soils and tolerating summer drought fairly well, although it prefers some coolness. In its natural habitat, it thrives in forests covering the slopes of the Central and Eastern Alps, between 300 and 1800m altitude, exclusively on limestone soil. The plant grows in a tuft of basal leaves, 30 cm tall and 50 cm wide. It consists of bright green leaves, divided into 5 to 7 lanceolate, toothed, fairly wide leaflets. The leaves last about 8 months before disappearing, while new ones are already emerging from the ground. Between December and March, brownish stems appear bearing 1 to 3 simple flowers, 4.5 to 8 cm in diameter. These are cup-shaped flowers, slightly nodding downwards. Their colour ranges from pure white, with a pinkish reverse, to pink-purple depending on their age. The centre is filled with yellow stamens. The Hellebore is a plant that dislikes being moved once established, with young plants sometimes taking 2 years to bloom. The seeds, produced abundantly, are sown by ants in April-May. They germinate easily after exposure to cold, during the following winter.

Use hellebores to create a rich and colourful garden scene, combining them with brighter shaded woodland plants. The Black Hellebore has only one requirement: a deep, fertile, limestone soil, even if it is clayey and somewhat dry in summer. Plant it in groups, like a bouquet, near the entrance of your house, in a shaded spot to fully enjoy its bright and early flowering. It perfectly lights up a shaded area, whether on the edge of a grove or understorey, alongside Euphorbia amygdaloides, Geranium macrorrhizum, Glechoma hederacea, wood anemones, corydalis or spring-flowering bulbs, enriching your garden landscape.

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Hellebores: planting, growing
Family sheet
by Alexandra 15 min.
Hellebores: planting, growing
Read article

Flowering

Flower colour white
Flowering time January to March, December
Inflorescence Solitary
Flower size 5 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Evergreen
Foliage colour dark green

Plant habit

Height at maturity 30 cm
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Helleborus

Species

niger

Family

Ranunculaceae

Other common names

Christmas Rose, Black Hellebore

Origin

Cultivar or hybrid

Product reference • 20484

Planting and care

Hellebore seeds may require a vernalization period (cold storage) to germinate. Sow the seeds immediately upon receipt in pots or trays filled with moist compost and cover them with a very fine pinch of compost or vermiculite. After sowing, enclose the trays or pots in a clear plastic bag and keep them around 20°C for 3 months. Then, place the enclosed container in its bag in a refrigerator for a 3-month period. After this cold period, return the seedlings to 20°C. Germination may be slow. Regularly check the pots and carefully remove the germinating seedlings as they appear, to plant them when manageable in 7.5 cm pots or trays. If germination has not occurred during this period, repeat the cold/hot cycle as indicated above.

Another germination method is to sow as follows: enclose the seedlings in a clear plastic bag and place them in a cold frame in a sheltered area of the garden. Regularly check the moisture of the compost, which should not dry out. Germination can take up to a year. The recommended methods for germinating seeds of this particular variety actually mimic how seeds germinate in natural conditions. By following these instructions, you should achieve a good germination rate.

 

Gradually acclimate the young plants to cooler conditions for a few weeks before planting them, after all risk of frost, maintaining a spacing of 45cm between each plant. Plant hybrid hellebores in a cool, humus-rich, fertile, well-drained soil, in non-burning sun or partial shade. Avoid moving a well-established hellebore.

The roots should not completely dry out in summer. Hellebores can fall victim to a cryptogamic disease transmitted by aphids, known as black spot disease. Remove old leaves from deciduous species or spotted leaves from evergreen species when floral buds appear. Remove faded flowers after seed drop. They can also suffer from grey rot or die from collar rot. This often stems from poor growing conditions, in overly wet situations.

On a balcony or terrace, plant them in pots 4 to 5 times larger than their size, as they need space to develop their root system. Very hardy, most hellebores can withstand negative temperatures down to -15°C without suffering, allowing them to adapt to almost all regions of the UK.

Sowing period

Sowing period February to March
Germination time (days) 90 days

Intended location

Suitable for Shaded rockery, Woodland edge, Undergrowth
Type of use Border, Edge of border, Container
Hardiness Hardy down to -23.5°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Exposure Sun, Partial shade
Soil pH Any
Soil moisture Moist soil, Draining, rich

Planting & care advice

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