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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.
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Other common names
Canna are rhizomatous herbaceous perennials with erect stems bearing ovate leaves, with showy flowers with showy petal-like staminodes and small, coloured petals and sepals, borne in racemes or panicles in summer and autumn
C. x ehemanii is a tall plant with large leaves and arching stems bearing nodding, reddish-purple flowers from early summer
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
MoistureMoist but well-drained
SoilSand, Chalk, Loam, Clay
pHAlkaline, Neutral, Acid
Time to ultimate height
Outdoors grow in a sheltered site in fertile soil in full sun, planting in early summer once frosts have passed. Water freely in dry weather and apply a high potassium fertiliser monthly. Lift the rhizomes in autumn when frost blackens the foliage. Store over winter in barely moist peat-free potting mix or leaf mould in frost-free conditions. In mild areas leave in the ground but cover with a dry mulch. Further canna cultivation advice
Propagate by seed at 21°C (70°F) in spring or autumn. Soak seed in warm water before sowing. Propagate by division in early spring
Suggested planting locations and garden types
Flower borders and beds
Architectural City & Courtyard Gardens Coastal Cottage & Informal Garden Patio & Container Plants
Pruning Deadhead to promote continued flowering. Leave to dieback in autumn
Pests Glasshouse red spider mite, slugs and caterpillars may be troublesome
Canna can be susceptible to a virus
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.
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