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Oreoselinum nigrum

Oreoselinum nigrum · Apiaceae

The gardener's calendar

The right move for September

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

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ID card

Family
Apiaceae
Type
Perennial herbaceous plant
Foliage
Deciduous
Flowering
Summer (July-August)
Adult size
40 to 80 cm in height
Hardiness
Hardy to -15 °C
Origin
Southern and central Europe
Preferred soil
Well-draining, calcareous

Care

Watering

Water moderately during the growing season, keeping the soil slightly moist. Reduce watering once established, as this plant tolerates drought well. Avoid excess water, which would promote root rot.

Exposure

Plant Oreoselinum nigrum in a sunny or partially shaded location. This plant appreciates direct light to flower well and develop its aromatic foliage. It thrives in warm, sheltered spots.

Soil

Choose well-draining soil, preferably calcareous or neutral. Enrich the soil with compost at planting time. Avoid compact or clayey soils that would retain moisture.

Pruning and cutting

Remove faded flowers to prolong flowering and encourage new growth. In autumn, cut the plant back to ground level after the foliage has dried. Spring cleaning removes dead stems.

Fertilizer

Apply balanced or low-nitrogen fertilizer in spring. This plant is not demanding and prefers moderately fertilized soils. Too much fertilizer would encourage foliage at the expense of flowering.

Diseases and pests

Generally hardy, it can occasionally suffer from root rot due to excessive moisture. Ensure good drainage and air circulation. Watch for slugs in very humid conditions.

Did you know?

Oreoselinum nigrum is an overlooked member of the Apiaceae family, rich in aromatic essential oils. Its deep taproot allows it to prospect for water far below the surface, explaining its great drought tolerance in mountainous areas and on calcareous slopes where it grows naturally.

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.