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Dotted Loosestrife

Lysimachia punctata

Also listed as Lysimachia villosa, Lysimachusa punctata

Also known as Large Yellow Loosestrife, Spotted Garden Loosestrife, Spotted Yellow Loosestrife

herbaceous☀️ full sun💧💧 moderate water❄ Hardy: Zone 4a – Zone 8b

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A vigorous perennial with yellow star-shaped flowers arranged in dense whorls along upright stems, blooming mid to late summer. It spreads readily and tolerates wet conditions, making it excellent for borders and moist garden areas.

Why grow it

Lysimachia punctata offers reliable summer color in wet or poorly drained sites where many ornamentals struggle, and its dense whorled flower spikes provide vertical interest distinct from typical daisy-form perennials. Compared to other Lysimachia species, it tolerates consistently moist conditions well and flowers prolifically without deadheading, though gardeners seeking lower-maintenance alternatives may prefer L. clethroides, which self-seeds less aggressively.

Watch out for

This species spreads vigorously by underground rhizomes and can outcompete neighboring perennials in favorable conditions, so plan for regular division or containment rather than expecting it to stay bounded. In drier climates it may require supplemental water to perform at its best, and it benefits from periodic thinning to prevent overcrowding and improve air circulation around the stems.

Overview

Form
Upright
Growth Rate
fast
Size
2–3′ tall × 1.5–2.5′ wide
Dormancy
deciduous
Family
Primulaceae
Pollinators & beneficial insects

Native Range

Eastern Europe and Western Asia

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Season of Interest

Summer

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Companion Planting

Plants well with