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Marsh cinquefoil

Comarum palustre · Rosaceae

The gardener's calendar

The right move for September

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

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ID card

Foliage
Deciduous
Blooming
June to August, dark purple flowers
Adult size
30 to 60 cm in height
Growth
Moderate
Hardiness
Very hardy, down to -20°C
Origin
Wetlands of Europe, Asia and North America
Soil type
Moist to waterlogged, peaty soil preferred

Care

Watering

Marsh cinquefoil demands a constantly moist, even permanently wet environment. Keep the soil saturated with water without letting it dry out between waterings. It thrives particularly well at the edges of ponds, ditches or low-lying areas where water naturally stagnates.

Light exposure

Choose a sunny to partially shaded location for generous blooming. This plant tolerates partial shade well but flowers less abundantly. However, avoid overly dark areas that slow its growth.

Soil and substrate

Plant it in acidic to neutral soil, rich in organic matter and constantly moist. Peaty, silty or clay soils suit it perfectly. Enrich with compost or peat to improve water retention.

Pruning and maintenance

No formal pruning is necessary. Simply remove dead stems in late winter or early spring to encourage branching. Leave faded flowers in place for a natural effect until autumn.

Fertilizer

Marsh cinquefoil has moderate nutritional needs. A light amendment in early spring with well-decomposed compost is sufficient. On very poor soils, an annual application of balanced organic fertilizer can boost flowering.

Diseases and pests

A robust plant, it is rarely affected by diseases or pests. Excessive stagnant water can promote root rot; ensure good air circulation. Aphids or other pests are exceptional on this species.

Did you know?

Marsh cinquefoil was traditionally used in folk medicine, notably for its supposed astringent properties. Its English name "marsh cinquefoil" recalls its characteristic five leaflets, common to all cinquefoils. It's an excellent biotope plant for restoring degraded wetlands and welcoming amphibians and insects.

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.