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Sea-milkwort

Lysimachia maritima · Primulaceae

The gardener's calendar

The right move for September

Ideal time to plant sea-milkwort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Scientific name
Lysimachia maritima
Family
Primulaceae
Type
Perennial herbaceous plant
Foliage
Deciduous
Flowering
July to September
Adult size
30 to 50 cm in height
Hardiness
Hardy down to -15 °C
Origin
Coasts of western Europe and the Mediterranean basin

Care

Light exposure

This plant thrives in full sun or partial shade, ideally in a coastal setting where it benefits from abundant light. It tolerates direct sunlight well if the soil stays cool. Avoid dense shade, which would slow flowering and weaken the plant.

Watering

Keep the soil consistently moist during the growing season, especially during hot periods. Water regularly without allowing water to stagnate, as maritime glaux appreciates fresh but well-drained soil. Reduce watering in winter when the plant enters dormancy.

Soil and planting

Choose rich, light, and well-draining soil enriched with organic matter such as compost. This coastal species adapts well to sandy or gravelly-sandy substrates typical of coastal areas. Neutral to slightly acidic pH is ideal.

Fertilizing

Apply balanced fertilizer in spring to stimulate growth and flowering. Diluted fertilizer every three weeks during the active growing phase is more than sufficient. Stop all fertilizing in autumn to let the plant rest.

Pruning and maintenance

Remove faded flowers regularly to extend flowering and limit plant exhaustion. In late winter or early spring, prune the clump lightly to encourage balanced branching. Clean up dead foliage after winter.

Pests and diseases

Maritime glaux is generally resistant. Monitor excessive moisture, which can promote powdery mildew or root rot if water stagnates. Good drainage and adequate air circulation are sufficient to prevent most disease problems.

Did you know?

Maritime glaux was once used in seaside gardens for its ornamental appeal and its remarkable ability to adapt to the harsh conditions of coastal zones. Its name 'maritima' precisely reflects this affinity for salty and windy shores, where it naturally colonizes cliffs and wet meadows.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

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Tips generated and checked by Viridia — adapt them to your local climate.