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Curly sedge

Carex rupestris · Cyperaceae

The gardener's calendar

The right move for September

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

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ID card

Foliage
Evergreen, fine and coriaceous
Flowering
Spring to early summer (April-June)
Adult size
10-20 cm tall, 15-30 cm wide
Growth
Slow to moderate
Hardiness
Very hardy, -30°C and below
Origin
Alpine and subalpine regions of Europe and Asia
Soil type
Well-drained, poor to moderate, limestone or neutral
Exposure
Full sun to partial shade

Care

Exposure

Install your Rock Sedge in full sun or partial shade for optimal growth. This alpine plant tolerates intense light very well. It appreciates an airy, well-ventilated location, close to the conditions of its natural habitat.

Soil and drainage

Very well-draining soil is essential: prioritize a mineral, poor, and slightly gravelly substrate. Improve permeability by adding gravel or fine sand. This Carex dislikes excess moisture, particularly in winter.

Watering

Water moderately and regularly during the growing period (spring-summer), allowing it to dry slightly between waterings. Significantly reduce watering in autumn and winter. Once established, this plant tolerates dry periods well thanks to its coriaceous foliage.

Pruning and cleanup

In late winter or early spring, remove any dead or damaged foliage. Light pruning helps maintain a compact, dense shape. This plant requires little intervention and develops naturally into rounded cushions.

Fertilizer

A very modest application of balanced fertilizer in spring is more than sufficient. This alpine plant prefers poor soils and excessive fertilization can weaken its structure. Most of the time, no feeding is necessary.

Diseases and pests

Rock Sedge is very robust and rarely affected by pests or diseases if drainage is correct. Excess moisture can promote root rot. Occasionally inspect and remove any diseased or damaged leaves.

Did you know?

Rock Sedge naturally grows on rocky slopes and mountain screes, forming small dense cushions that stabilize unstable soils. Its fine yet robust roots anchor themselves in rock crevices, making it a valuable pioneer plant for restoring alpine environments. In gardening, it's highly prized by rock garden enthusiasts and alpine garden lovers.

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.