Mediterranean Buckthorn (Rhamnus lycioides)

Mediterranean Buckthorn

Rhamnus lycioides

Its silvery foliage glows in Mediterranean sun, a hardy evergreen shrub. Common name: Mediterranean Buckthorn.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Prefers full sun to partial shade; tolerant of intense Mediterranean sunlight and heat
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Watering Drought-tolerant once established; water deeply but infrequently, avoid waterlogged soil
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Temperature Hardy to mild frost (down to 5°C); thrives in warm, dry Mediterranean climates
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Characteristics

  • Leaf: Small, oblong to elliptical leaves with silvery-gray undersides, leathery texture
  • Flower: Tiny pale yellow to greenish-white clustered flowers, inconspicuous
  • Stem: Slender gray-brown stems with sparse thorns on mature plants
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Care Guide

Watering

Water every 7–10 days during dry spells; allow top 2–3 cm of soil to dry between waterings

Fertilization

Apply diluted compost tea once monthly. Avoid high-nitrogen fertilizers to prevent excessive foliage growth at the cost of flowering

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium levels and improve soil drainage
Pruning
  • Remove dead or damaged branches in late winter to maintain plant health and shape
  • Thin dense inner growth to improve airflow and light penetration
  • Trim back overgrown stems after flowering to encourage compact, bushy growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Mildly toxic; ingestion of berries may cause vomiting and diarrhea

Humans: Ingestion of large quantities of berries may cause mild gastrointestinal upset

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental hedging for xeriscaping; berries provide food for native birds