Rough Bindweed (Smilax aspera)

Rough Bindweed

Smilax aspera

Its thorny stems weave through shrubs, a hardy evergreen vine with subtle blooms. Evergreen climbing perennial; common names: rough bindweed, Mediterranean sarsaparilla.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerant of coastal salt spray and dry conditions
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Watering Water deeply when top 2–3 cm of soil dries out; drought-tolerant once established
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Temperature Hardy to short-term -5°C frosts; thrives in warm temperate to Mediterranean climates
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Characteristics

  • Leaf: Leathery, ovate to elliptical leaves with spiny margins and petioles
  • Stem: Woody, climbing stems with hooked thorns for anchorage
  • Flower: Small, greenish-yellow, fragrant axillary clusters
  • Fruit: Round, black berries ripening in autumn
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Care Guide

Watering

Maintain consistent soil moisture during active growth; reduce during heavy rainfall

Fertilization

Apply balanced organic feed once at the start of growth. Use low-nitrogen organic feed to avoid excessive foliage growth at the expense of flowering

Eggshell powder top-dressing:Crush dried eggshells into fine powder; sprinkle 1–2 tbsp around the plant base every 3 months to boost soil calcium levels
Pruning
  • Trim overgrown stems in late winter to control spread and maintain desired shape
  • Remove dead or damaged foliage to improve airflow and reduce pest risk
  • Cut back tangled vines to prevent overcrowding of neighboring plants
  • Wear thick gloves to avoid injury from hooked thorns during pruning
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxic effects for humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental climbing vine for fences and shrub borders; traditional medicinal uses for root extracts