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Parsley water-dropwort

Oenanthe lachenalii · Apiaceae

The gardener's calendar

The right move for September

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

JFMAMJJASOND Planting

ID card

Family
Apiaceae (umbellifers)
Plant type
Herbaceous perennial
Foliage
Deciduous
Flowering
Summer (June to August)
Mature size
40 to 80 cm in height
Growth rate
Moderate
Hardiness
Hardy, zones 5 to 9
Origin
Coastal marshes and wet areas of western Europe

Care

Watering

Oenanthe lachenalii appreciates soil kept moist, particularly during active growth periods. Water regularly without excessive waterlogging. In winter, reduce watering but don't let the soil dry out completely.

Light Exposure

Place this plant in a sunny to partially shaded location. It tolerates partial shade well and may even prefer it in very hot regions. Moderate sunlight promotes generous flowering.

Soil and Substrate

Choose soil rich in organic matter, well-draining yet consistently moist. This plant thrives in environments close to natural marshy areas. Improve the soil with compost before planting.

Fertilizer

Apply a balanced or slightly nitrogen-rich fertilizer in spring when vegetation resumes. One application is generally sufficient for the season. Avoid excess amounts that might favor foliage over flowers.

Pruning and Maintenance

Remove spent flowers to extend blooming and keep the plant tidy. In late autumn, cut back dried foliage to ground level. Little intervention is needed; oenanthe naturally grows in an elegant and structured manner.

Diseases and Pests

This plant is generally healthy. Watch for excess moisture that could encourage root rot. Ensure adequate drainage. Specific pests are rare; good cultural hygiene is sufficient.

Did you know?

Oenanthe lachenalii takes its scientific name from Johann Heinrich Lachenal, an 18th-century Swiss botanist. This discreet yet elegant plant was particularly admired by Victorian naturalists for its small white flowers in umbels, which bring remarkable lightness to wet gardens and natural water features.

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.