Alpine Ptychotis (Ptychotis saxifraga)

Alpine Ptychotis

Ptychotis saxifraga

Tiny star blooms dot alpine rock crevices with delicate charm. Low-growing alpine perennial.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires bright full sun in alpine conditions; tolerates partial shade in warmer lowland areas to prevent leaf scorch
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Watering Keep soil evenly moist but well-drained; avoid waterlogging to prevent root rot in heavy soils
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Temperature Hardy to subzero alpine temperatures; avoid prolonged heat above 25°C which can cause stress
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Characteristics

  • Leaf: Basal rosettes of small, spatulate to obovate gray-green leaves with slightly serrated, fuzzy margins
  • Flower: Tiny white to pale pink star-shaped blooms clustered in flat-topped umbels at stem tips
  • Stem: Slender, erect, hairy stems rising from dense basal rosettes
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Care Guide

Watering

Keep soil consistently moist; water when top 1 cm of substrate dries

Fertilization

Diluted low-nitrogen feed once monthly. Use diluted feed only during active growth to avoid over-fertilization

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle lightly on soil surface to boost calcium content and improve drainage; avoid overapplication to prevent pH imbalance
Pruning
  • Deadhead spent blooms to maintain tidy growth and prevent self-seeding if desired
  • Trim back faded stems after flowering to promote healthy basal rosette regrowth
  • Remove damaged or yellowing leaves to improve airflow and reduce fungal risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: No documented toxicity to cats per ASPCA

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental rock garden and alpine trough plant