Helleborus purpurascens 'Pluto' (Christmas Rose) — Clump-forming, mounded

Overview

Helleborus purpurascens 'Pluto' 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. Helleborus purpurascens 'Pluto' 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. Suggested uses include shade garden, woodland garden and underplanting for deciduous shrubs. It is native to Balkans.

About

Helleborus purpurascens 'Pluto' is a clump-forming, mounded perennial hellebore that flowers in winter to early spring (January to April). It bears leathery, palmately divided dark green leaves that are evergreen or semi-evergreen. The plant favours sheltered, north, east or west-facing positions and performs best in fertile heavy loam or clay enriched with humus. It will tolerate full sun only where the soil remains reliably moist.

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

A member of the Ranunculaceae native to the Balkans, Helleborus purpurascens 'Pluto' is a winter-flowering hellebore valued for blooms from January to April and its enduring dark green foliage. As a clump-forming, mounded perennial it suits shady, sheltered spots and carries leaves that may persist through winter or die back depending on conditions. Place 'Pluto' in partial shade on a north, east or west-facing aspect where soil is a fertile heavy loam or clay with plenty of humus; the soil should be moist but well drained and neutral to alkaline in reaction. It will tolerate stronger light only if water is consistent. The species is rated H6–H7, which in UK terms means very hardy to fully hardy and able to withstand typical winter conditions in most gardens. Use Helleborus purpurascens 'Pluto' in shade borders, woodland gardens or as an underplanting beneath deciduous shrubs where its winter flowers can appear before the shrub leafs up. Sit plants where their early January–April blooms can be seen against bare stems of larger shrubs for best effect.

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 purpurascens 'Pluto' size, habit and characteristics

Plant type: Perennial
Habit: Clump-forming, mounded
Foliage: Evergreen or semi-evergreen; leathery, palmately divided, dark green
Suggested uses: Shade garden, woodland garden, underplanting for deciduous shrubs
Native to: Balkans

Care notes

Pruning and caring for Helleborus purpurascens 'Pluto'

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 purpurascens 'Pluto'?

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 purpurascens 'Pluto'?

Helleborus purpurascens 'Pluto' prefers partial shade; tolerates full sun in reliably moist soil. It suits sheltered positions.

What soil does Helleborus purpurascens 'Pluto' need?

Helleborus purpurascens 'Pluto' 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 purpurascens 'Pluto'?

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.

Is Helleborus purpurascens 'Pluto' hardy in the UK?

Helleborus purpurascens 'Pluto' 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 purpurascens 'Pluto'?

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.

More in the Helleborus genus

Browse all Helleborus →