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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 honeywort 'Purpurascens'
Synonyms Cerinthe major var. purpurescens
Family Boraginaceae
Genus Cerinthe can be annuals, biennials or perennials, with simple, often greyish leaves and tubular flowers borne in a pendent terminal cluster with conspicuous bracts
Details 'Purpurascens' is an upright annual to 60cm, with blue-green leaves and tubular yellow and purple flowers with conspicuous purple bracts
Foliage Deciduous
Habit Bushy
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H3
Full Sun
Aspect South-facing or West-facing
Exposure Sheltered
Loam
Chalk
Sand
MoistureWell-drained
SoilLoam, Chalk, Sand
pHNeutral, Acid, Alkaline
Ultimate height 0.5-1 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 1-2 years
Cultivation Grow in a well-drained, fertile soil in a sheltered position in full sun
Propagation Propagate by seed sown in gentle heat in spring, plant out when the danger of frost has passed
Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Cottage & Informal Garden Patio & Container Plants
Pruning Cut back after flowering
Pests Generally pest free
Diseases Generally disease free
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
honeywort 'Purpurascens'
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