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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.
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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
dahlia 'Bishop of York'
Dahlia are tuberous rooted perennials with pinnately divided leaves and showy flowerheads, double in many cultivars, in summer and autumn
Miscellaneous dahlias encompass those cultivars that do not fit in the more formal classification groups
'Bishop of York' is a tuberous perennial to 1m in height with toothed, pinnate, dark brown-green leaves. Single to semi-double, orange-flushed, yellow flowers are borne from midsummer to early 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 East-facing or West-facing
MoistureMoist but well-drained, Well-drained
SoilLoam, Clay, Sand
pHAcid, Neutral, Alkaline
Time to ultimate height
Grow in fertile, humus-rich, well-drained soil, enriched with organic matter and general purpose fertiliser, in full sun. Pinch out growing tips to encourage bushy plants and stake (see staking perennials). Water freely in dry periods. Lift and store tubers in autumn to replant or use as a source of cuttings in spring
Propagate by softwood cuttings taken in spring from shoots from stored tubers, or divide the tubers ensuring each division has a viable bud
Suggested planting locations and garden types
Flower borders and beds Cut Flowers Drought Resistant Wall-side Borders
City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants Architectural Wildlife Gardens
Pruning Deadhead to prolong flowering. Cut back to near ground level in the autumn, before lifting and storing for the winter
Pests Aphids, leaf miners, glasshouse red spider mite and slugs are common pests. Earwigs sometimes damage blooms. Capsid bug and caterpillars are occasional pests
Powdery mildews can be damaging in dry conditions. In wet weather grey moulds and other fungal rots can be a problem. Fungal rots can also damage stored tubers. A virus may cause stunting, leaf markings and distortion
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
dahlia 'Bishop of York'
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