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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 double-flowered Japanese rose bachelor's buttons
Japanese rose 'Pleniflora'
Synonyms Kerria japonica 'Flore Pleno' Kerria japonica 'Plena'
Kerria japonica
Family Rosaceae
Genus Kerria are deciduous shrubs withgreen young shoots bearing simple, toothed leaves and rose-like, solitary 5-petalled flowers in mid-spring
Details 'Pleniflora' is a vigorous suckering medium-sized deciduous shrub, with prominently veined, light green leaves and solitary bright yellow, double flowers from mid-spring
Foliage Deciduous
Habit Suckering
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
Partial Shade
Aspect North-facing or South-facing or West-facing or East-facing
Exposure Exposed or Sheltered
Chalk
Clay
Loam
Sand
MoistureMoist but well-drained, Well-drained
SoilChalk, Clay, Loam, Sand
pHAcid, Alkaline, Neutral
Ultimate height 2.5-4 metres
Ultimate spread 1.5-2.5 metres
Time to ultimate height 5-10 years
Cultivation Grow in any well-drained or moist but well-drained soil in sun or partial shade. Good for woodland settings but may form large thickets and has the potential to become a nuisance
Propagation Propagate by semi-hardwood cuttings
Suggested planting locations and garden types Low Maintenance Cottage & Informal Garden
Pruning Pruning group 3 and sucker removal if necessary in autumn or winter
Pests Generally pest free
Diseases Generally disease free
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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.