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We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
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Other common names
hellebore Blackthorn Group
Helleborus × sternii 'Blackthorn Strain'
Helleborus can be rhizomatous, herbaceous or semi-evergreen perennials forming a clump of pedate basal leaves, or evergreen with erect, leafy stems. Large, bowl-shaped flowers are borne in loose clusters in late winter or spring
Blackthorn Group are evergreen perennials to 45cm with purplish biennial stems bearing leaves composed of three bluish-green, pale-veined leaflets. Nodding, pale pinkish-green flowers 3-5cm in width are borne in open clusters
Toxicity Ingestion may cause severe discomfort
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect North-facing or South-facing or East-facing or West-facing
MoistureMoist but well-drained
SoilClay, Loam, Chalk
Time to ultimate height
Thrives in neutral to alkaline soils that are moist, fertile and humus-rich. Partial shade is ideal but can tolerate full sun. Provide shelter from strong, cold winds. Mulch annually in autumn
Propagate by seed in pots in a cold frame as soon as seed is ripe or propagate by division after flowering in early spring or late summer. Named cultivars do not come true from seed
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Underplanting of Roses and Shrubs
Cottage & Informal Garden
Pruning Remove faded or damaged foliage as the flowers appear
Pests Prone to hellebore aphid and snails
May be affected by hellebore leaf spot and a virus
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Join the RHS today and get 12 months for the price of 9