Rock Stonecrop (Sedum forsterianum)

Rock Stonecrop

Sedum forsterianum

Tough, low-growing succulent with starry blooms. Mat-forming evergreen groundcover; common name: Rock Stonecrop.

Full sun
0–1/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates coastal salt spray and prolonged dry periods
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Watering Allow soil to dry completely between waterings; highly drought-tolerant, avoid overwatering
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Temperature Hardy to -15°C; withstands hot, dry summer conditions without damage
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Characteristics

  • Leaf: Small, fleshy, blue-green to grey-green obovate leaves arranged in rosettes along trailing stems
  • Flower: Clusters of star-shaped pale yellow flowers with five delicate petals
  • Stem: Slender, trailing stems that root at nodes to form dense, spreading mats
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Care Guide

Watering

Water sparingly only when top 2–3 cm of soil is fully dry

Fertilization

Diluted balanced feed once every 6 weeks. Use extremely diluted feed to avoid fertilizer burn on sensitive succulent foliage

Eggshell powder topdress:Grind dried eggshells to fine powder; dust lightly on soil surface every 3 months; avoid direct contact with leaves to prevent foliar damage
Pruning
  • Trim back leggy, elongated stems in early spring to encourage compact, dense growth
  • Remove spent flower heads after blooming to maintain a tidy appearance
  • Thin overcrowded mats to improve airflow and reduce risk of fungal rot
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats; no reported toxicity symptoms

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Groundcover for rock gardens, green roofs, and container edges; erosion control on sloped landscapes