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Euphorbia seguieriana

Euphorbia seguieriana · Euphorbiaceae

The gardener's calendar

The right move for September

Ideal time to plant euphorbia seguieriana: 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, light green to bluish
Flowering
Spring (April-May), yellow-green flowers in umbels
Adult size
30 to 60 cm tall, upright and compact habit
Growth
Fast to moderate
Hardiness
Very hardy, down to -15°C
Origin
Central and Mediterranean Europe
Soil type
Well-drained, calcareous, undemanding
Exposure
Full sun to partial shade

Care

Exposure

Seguier's spurge thrives in a well-sunny position that promotes its compact structure and generous flowering. It tolerates partial shade but remains more open and less floriferous in such conditions. Avoid overly shaded areas where it would become leggy.

Watering

After planting, water moderately except during prolonged drought. Once established, this spurge is very tolerant of drought and fears excess moisture more than lack of water. In winter, reduce watering to the bare minimum.

Soil

Prefer well-drained, slightly calcareous soil. Rocky or sandy soil works particularly well. Avoid heavy or permanently wet soils that promote root rot. Improve drainage with gravel or sand if necessary.

Pruning

This spurge requires only light pruning in spring to remove dead wood or stems damaged by winter. You can cut it back slightly after flowering to maintain a compact habit and encourage branching.

Fertilizer

Seguier's spurge is undemanding in nutrients and requires only a light application in spring. A balanced fertilizer or compost spread on the surface is more than sufficient. Avoid excess nitrogen, which promotes overly lush foliage at the expense of flowering.

Diseases and pests

This plant is generally robust and rarely troubled by problems. However, watch for powdery mildew in case of stagnant humidity, and spider mites in very dry situations. Root rot can occur in waterlogged soil, which is why good drainage remains essential.

Did you know?

Seguier's spurge owes its scientific name to French botanist and naturalist Jean-François Séguier (1703-1784), who conducted extensive botanical work in Provence. Like all Euphorbiaceae, it produces a milky white sap that is slightly irritating: it is wise to wear gloves when pruning to avoid skin irritation.

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.