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Jacobaea paludosa

Jacobaea paludosa · Asteraceae

The gardener's calendar

The right move for September

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

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ID card

Common name
Marsh ragwort
Family
Asteraceae
Plant type
Perennial herbaceous plant
Flowering
July to September
Adult size
60 to 120 cm in height
Foliage
Deciduous
Hardiness
Very hardy (zone 3-4)
Origin
Central and Northern Europe

Care

Exposure

Choose a sunny to partly shaded location for optimal flowering. This plant thrives in open, well-ventilated areas. It dislikes overly shaded spots where flowering becomes sparse.

Soil and substrate

Marsh ragwort prefers moist to wet soils rich in organic matter. It adapts well to heavy and clayey soils. Improve drainage of overly compact soils by adding compost before planting.

Watering

Keep the soil regularly moist without letting it dry out during the growing period. Water generously in summer and reduce watering in winter. Container-grown plants need closer attention than those planted in the ground.

Fertilizing

A spring application of well-decomposed compost is usually sufficient. Soils rich in organic matter don't require additional fertilization. Avoid excess nitrogen, which promotes foliage at the expense of flowering.

Pruning and maintenance

Cut back faded stems after flowering to encourage branching. Clean up in autumn or spring to remove dead parts. You can pinch young plants in May to make the clump denser.

Pests and diseases

This plant is generally robust and little susceptible to pests. Excessive moisture and poor air circulation can promote fungal diseases. Space plants adequately and avoid foliage watering late in the day.

Did you know?

Marsh ragwort is named in honor of the Apostle Saint James, whose iconographic representation bears a shell. This plant was once used in traditional herbal medicine, particularly in Northern European regions. Its natural presence in wetland areas makes it an excellent ally for restoring marshy ecosystems.

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.