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Carex lachenalii

Carex lachenalii · Cyperaceae

The gardener's calendar

The right move for September

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

JFMAMJJASOND Planting

ID card

Foliage
Evergreen, light to medium green
Flowering
Spring (April-May)
Mature size
20-40 cm tall, 30-50 cm spread
Growth
Moderate
Hardiness
Very hardy (zones 4-8)
Origin
Alpine and subalpine Europe
Soil type
Well-drained, fresh, slightly acidic to neutral

Care

Light Exposure

Plant this sedge in part shade or partial sun for a compact and vigorous habit. It tolerates light shade but prefers areas receiving 3 to 4 hours of direct light per day. Avoid intense full sun in very hot climates, which can yellow the foliage.

Watering

Keep the soil fresh but well-drained, especially during spring growth. Water regularly during dry periods without creating waterlogging. Once established, it tolerates moderate drought; adjust based on local conditions.

Soil

Choose well-drained soil rich in organic matter and slightly acidic to neutral. Improve poor soil at planting with compost or peat. This species appreciates a porous texture that prevents root suffocation.

Pruning and Cutting

Remove old damaged or dried foliage in late winter or early spring. Light combing rejuvenates the clump. Avoid severe cutting that weakens the plant; the natural habit is generally its main asset.

Fertilizer

Apply balanced fertilizer in spring when growth resumes. An annual application of well-decomposed compost is enough to maintain soil fertility. Limit excessive nitrogen, which promotes foliage at the expense of structure.

Diseases and Pests

This sedge is generally hardy and rarely subject to serious pests or diseases. Root rot can occur with prolonged waterlogged soil; always improve drainage. Watch for scale insects indoors, very rare in the open garden.

Did you know?

Lachenal's Sedge takes its common name from Swiss ornithologist and botanist Nicolas-Théodore Lachenal (1754-1799). These small grasses or sedges play a major ecological role in mountains, stabilizing moist soils and serving as forage for wild ungulates. In gardening, sedges have become quiet stars of the renewed 'naturalistic' plantings for their delicate beauty and tolerance of difficult soils.

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.