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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
dahlia [Happy Single Princess]
Dahlia are tuberous rooted perennials with pinnately divided leaves and showy flowerheads, double in many cultivars, in summer and autumn
Single-flowered dahlias have flowerheads usually less than 10cm across, with one or two rows of spreading ray florets, surrounding a central boss of small tubular disc florets which are valuable for bees and butterflies
Happy Single Princess is a compact herbaceous perennial, to 80cm high, with leaves so dark they are almost black. Single flowers, 5cm across, with eight white rays, tinged with pink, and a golden yellow central disc, in summer and autumn
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
SoilLoam, Chalk, Sand, Clay
pHAcid, Alkaline, Neutral
Time to ultimate height
Grow in fertile, humus-rich, well-drained soil, enriched with organic matter, in full sun; lift and store tubers in autumn to replant or use as a source of cuttings in spring; poor flowering may be caused by overfeeding with high nitrogen fertilisers, not enough direct sunshine or not enough moisture at the roots; for more advice, see dahlia cultivation
Propagate by softwood cuttings taken in spring from shoots from stored tubers, or divide the tubers, ensuring that each division has a viable bud
Suggested planting locations and garden types
Flower borders and beds Cut Flowers
Patio & Container Plants Cottage & Informal Garden City & Courtyard Gardens
Pruning Deadhead to prolong flowering; cut back to near ground level in the autumn, before lifting and storing for the winter
Pests May be affected by aphids, capsid bug, earwigs, caterpillars, slugs and glasshouse red spider mite
May be affected by powdery mildews, dahlia mosaic virus, cucumber mosaic virus, tomato spotted wilt virus, storage rots, and leafy gall
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.
Join the RHS today and get 12 months for the price of 9