String of Buttons (Crassula rupestris)

String of Buttons

Crassula rupestris

Stacked fleshy leaves create a geometric, trailing charm. Drought-tolerant succulent; common names: String of Buttons, Rosary Vine.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect to full sun; tolerate partial shade; avoid intense midday summer sun to prevent leaf scorching
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Watering Allow soil to dry completely between waterings; avoid overwatering to prevent root rot, the primary health risk for this succulent
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Temperature Thrives at 15–25°C; protect from frost below 10°C, as cold temperatures can damage fleshy leaves
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Characteristics

  • Leaf: Opposite, oval, fleshy gray-green leaves with red margins, arranged in stacked, paired rows
  • Flower: Small, star-shaped white to pale pink blooms in terminal clustered inflorescences
  • Stem: Slender, trailing or upright stems; becomes woody with mature growth
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Care Guide

Watering

Water when the top 2–3 cm of soil is fully dry; reduce frequency during extreme heatwaves to avoid root stress

Fertilization

Diluted succulent fertilizer once monthly. Discontinue fertilization in autumn and winter when growth slows

Eggshell powder topdress:Crush fully dried eggshells into fine powder; sprinkle lightly on the soil surface, avoiding direct contact with leaves to prevent burning
Pruning
  • Remove dead or yellowing leaves at the base to maintain plant appearance and improve airflow
  • Trim leggy stems in early spring to encourage bushier, compact growth
  • Pinch back growing tips to promote branching and a fuller trailing habit
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion causes vomiting, depression, ataxia, and potential heart rhythm abnormalities in severe cases

Humans: Contains bufadienolides; ingestion may cause mild gastrointestinal upset including nausea and abdominal pain

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental succulent for hanging baskets, window sills, or rock garden edging