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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.
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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:
This plant will provide nectar and pollen for bees and the many other types of pollinating insects.
It is included in an evolving list of plants carefully researched and chosen by RHS experts. Divided into 3 groups these lists, linked below, are maintained by a team of RHS staff and are reviewed annually.
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Other common names
candle larkspur alpine delphinium
common bee larkspur
Delphinium can be annuals, biennials or perennials, with palmately lobed basal leaves and showy bowl-shaped flowers in spikes, racemes or panicles
D. elatum is a tall, upright, herbaceous perennial to 180cm with deeply lobed leaves and stiff spikes of dark, purplish-blue flowers in summer
Europe to N & C Asia
Toxicity All parts may cause severe discomfort if ingested. Wear gloves and wash hands after handling
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or West-facing or East-facing
MoistureMoist but well-drained, Well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in a fertile, well-drained soil in full sun; shelter from strong winds and stake well. For best flower spikes thin shoots when 7cm high to leave a minimum of 2-3 shoots on young plants and 5-7 shoots on established plants
Propagate by taking pencil-thick, basal, softwood cuttings in early spring
Suggested planting locations and garden types
Flower borders and beds Cut Flowers
Cottage & Informal Garden
Pruning Deadhead by cutting spent flower spikes back to small flowering side shoots. Removing of the flower spikes straight after flowering may encourage a second flush of flowers in late summer. Cut down all growth to ground level after it has withered in autumn
Pests Prone to slugs, snails, leaf miners and caterpillars
May be affected by powdery mildews, crown rot and a virus
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.