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Herbaceous Perennial

Lysimachia clethroides
  • RHS AGM
  • RHS Plants for pollinators

gooseneck loosestrife

Vigorous herbaceous perennial forming an extensive colony of erect stems to 1m in height, with narrow, greyish leaves. Small greyish-white flowers are borne in slender terminal spikes

Other common names
gooseneck
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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.5–1 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Poorly–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Grey Silver
Summer White Green Grey Silver
Autumn
Winter
Position
  • Full sun
  • Partial shade
Aspect

South–facing or West–facing or East–facing

Exposure
Sheltered
Hardiness
H6
Botanical details
Family
Primulaceae
Native to the UK
No
Foliage
Deciduous
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

Name status

Correct

Plant range
Far East

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How to grow

Cultivation

Grow in humus-rich, moist soil that does not dry out in summer. Site in full sun or partial shade and allow plenty of room as it can be invasive. May need support

Propagation

Propagate by seed in pots outdoors spring or propagate by division in spring or autumn

Suggested planting locations and garden types
  • Cottage and informal garden
  • Wildlife gardens
  • Flower borders and beds
Pruning

Cut back after flowering

Pests

May be attacked by slugs and snails

Diseases

Generally disease free

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