Mediterranean spurge

Sun

Full sun; tolerates light shade, but growth may become looser and flowering less abundant.

Water

Low once established. Water during establishment and prolonged drought; avoid persistently damp soil.

Soil

Well-drained sandy, gravelly or loamy soil, preferably lean to moderately fertile. Good winter drainage is essential; tolerates alkaline soil.

Height

3-4 ft (0.9-1.2 m)

Spread

2-4 ft (0.6-1.2 m)

Flowers

Late winter to early summer, depending on climate; tiny flowers sit within conspicuous lime-green to yellow-green bracts.

Foliage

Evergreen. Narrow, blue-green leaves crowd the upright stems, forming a rounded, architectural clump.

Growth

Moderate; often reaches its mature size within two or three growing seasons.

Care needed

Low

• Water newly planted specimens when the root zone dries; reduce watering once established.
• Plant in free-draining ground or a raised bed rather than wet clay.
• Avoid routine feeding; rich soil can produce soft, floppy growth.
• Use a thin gravel mulch and keep it clear of the stem bases.
• Wear gloves, long sleeves and eye protection when cutting; keep sap off your skin and out of your eyes.

Pruning. After flowering, cut each spent flowering stem down to its base, leaving the fresh, non-flowering shoots to bloom next year. Remove damaged stems in spring, and deadhead before seed ripens if seedlings are unwanted.

Early spring

Remove frost-damaged stems and check that winter moisture has not softened the crown.

Spring

Plant in a sunny, freely drained position and water while roots establish.

Late spring

Check developing seed heads and remove them before seeds scatter if spread is a concern.

Early summer

Cut finished flowering stems to the base without removing the new leafy shoots.

Summer

Water established plants only during prolonged dry spells; check containers more often.

Autumn

Pull unwanted seedlings and clear fallen leaves away from the crown to maintain drainage.

• Use as an evergreen anchor among lower plants in a sunny gravel garden.
• Pair with lavender, sage and rosemary for contrasting leaf shapes in a Mediterranean border.
• Repeat clumps through ornamental grasses to provide solid winter structure.
• Set against a dark wall or hedge so the lime-green spring bracts stand out.

Garden styles it suits: Modern Mediterranean, Architectural minimal, Dry gravel garden, Mediterranean, Desert / xeriscape and Winter interest.

Plant it with: Lavender, Rosemary, Bearded iris, Catmint, Purple sage and Blue fescue.

Wildlife: The exposed flowers provide nectar and pollen for bees, hoverflies and other insects. Deer and rabbits usually avoid the foliage, though no plant is completely browsing-proof.

• Root or crown rot in wet soil: improve drainage, reduce watering and replace badly affected plants in a drier position.
• Cold damage: provide shelter from cold winds and remove dead stems after severe frost has passed.
• Aphids on soft shoots: wash off small colonies with water and encourage natural predators.
• Excessive seedlings: remove flower heads before seed ripens and pull seedlings while small.

Toxic to people, cats, dogs and horses if eaten. All parts contain irritating milky sap; ingestion can cause mouth irritation, vomiting and diarrhoea. Sap can cause severe skin irritation and serious eye injury. Keep it away from children and animals likely to chew plants, and seek urgent medical advice for eye exposure.

Where it spreads. Can self-seed freely in mild, dry climates and is an environmental weed in parts of southern Australia, including Victoria. Avoid planting near natural vegetation where it escapes locally, and remove seed heads before they ripen.

• Wood spurge (Euphorbia amygdaloides)

  Usually shorter, with broader, darker green leaves; it tolerates shade better than Mediterranean spurge.

• Myrtle spurge (Euphorbia myrsinites)

  Has low, trailing stems with thick, overlapping blue-grey leaves rather than tall upright stems with narrow leaves.

• Siberian spurge (Euphorbia seguieriana)

  Forms a finer-textured mound with much narrower leaves and smaller, airier yellow-green flower clusters, usually later in the season.

Euphorbia honours Euphorbus, physician to King Juba II of Mauretania, while the common name refers to the plant's Mediterranean origins.

Propagation. Grow the species from seed, or take basal shoot cuttings in late spring or early summer with protection against sap exposure. Seedlings may differ from their parent; propagate named cultivars by cuttings to retain their characteristics.

Accepted botanical name

Euphorbia characias

In the US and Canada

Introduced in the lower 48 states.

Native range

Albania, Baleares, Corse, East Aegean Is., France, Greece, Italy, Kriti, Libya, Morocco, Portugal and Sardegna.

Measured

Soil pH 7 to 7.5. Average height 100 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.