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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 wallflower 'Sunset Primrose'
Family Brassicaceae
Genus Erysimum can be annuals, biennials or woody-based perennials with narrow leaves and dense racemes of often fragrant, 4-petalled flowers
Details 'Sunset Primrose' is a short-lived, evergreen perennial to 50cm, normally grown as a biennial. The richly-fragrant flowers open in mid spring, starting lemon yellow and ageing to primrose
Foliage Evergreen
Habit Columnar/Upright
Fragrance Flower
Hardiness
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H5
Full Sun
Aspect South-facing or West-facing
Exposure Exposed or Sheltered
Chalk
Clay
Loam
Sand
MoistureWell-drained
SoilChalk, Clay, Loam, Sand
pHAlkaline, Neutral
Ultimate height 0.1-0.5 metres
Ultimate spread 0.1-0.5 metres
Time to ultimate height 1-2 years
Cultivation Grow in poor to moderately fertile, well-drained, preferably alkaline soil in full sun
Propagation Propagate by seed sown in a seed bed from late spring to early summer, transplanting to flowering positions in mid-autumn
Suggested planting locations and garden types Flower borders and beds City & Courtyard Gardens Patio & Container Plants Cottage & Informal Garden
Pruning No pruning needed
Pests May be attacked by slugs, snails and flea beetles
Diseases Susceptible to a range of diseases including club root, downy mildews, leaf spot, root rot and a virus
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