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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:
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.
the RHS today and get 12 months for the price of 9
Other common names
Rocky Mountain columbine Colorado blue columbine
Aquilegia helenae hort. ex Bergmans. Aquilegia leptocera
Aquilegia are clump-forming herbaceous perennials with long-stalked, ternately divided basal leaves and erect, leafy stems bearing bell-shaped flowers with spreading, coloured sepals and petals with spurs, on branched stems
A. coerulea is an upright perennial with mid-green leaves and deeply lobed leaflets; hairy on their undersides. Flowers are bicoloured with pale to dark blue, wide-spreading sepals and white petals with slender spurs
W North America
Toxicity Ingestion may cause mild stomach upset
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 North-facing or East-facing or West-facing
Exposure Exposed or Sheltered
MoistureMoist but well-drained
SoilLoam, Chalk, Sand, Clay
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in fertile, moist but well-drained soil in full sun or partial shade
Propagate by seed sown in pots in a cold frame as soon as seed is ripe or in spring. It can also be propagated by division in spring but the plant will be slow to recover
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Low Maintenance
Cottage & Informal Garden
Pruning Cut back foliage affected by fungal diseases
Pests Can get aphids, leaf-mining flies and sawflies
May be infected by powdery mildews and aquilegia downy mildew
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.