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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 yellow loosestrife common loosestrife
golden loosestrife golden willowherb willow wort wood pimpernel yellow rocket yellow willowherb
Family Primulaceae
Genus Lysimachia are herbaceous or evergreen perennials with simple leaves and star-shaped, cupped or bowl-shaped flowers in terminal racemes or panicles, or solitary in leaf axils
Details L. vulgaris is a hairy perennial that forms clumps by creeping stolons or rhizomes. Leaves are ovate, green, sometimes with black dots, and occur in groups of three or four. Yellow flowers are borne in terminal clusters in summer
Plant range Europe, Asia
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
H6
Full Sun
Partial Shade
Aspect West-facing or East-facing or South-facing
Exposure Exposed or Sheltered
Clay
Loam
MoisturePoorly-drained
SoilClay, Loam
pH
Ultimate height 1-1.5 metres
Ultimate spread 0.5-1 metres
Time to ultimate height 2-5 years
Cultivation Occurs naturally in damp places on rich soils
Propagation Propagate by seed or propagate by division
Suggested planting locations and garden types Wildlife Gardens
Pruning May be cut back at the end of the season
Pests Generally trouble free
Diseases Generally trouble 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.