Annual Pearlwort (Sagina apetala)

Annual Pearlwort

Sagina apetala

Tiny, carpet-like foliage creates soft green ground cover. Low-growing annual herb; common name: Annual Pearlwort.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Prefers full sun to partial shade; tolerates cool, bright indoor terrarium light
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Watering Keep soil evenly moist but not waterlogged; avoid allowing the substrate to dry out completely
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Temperature Thrives in cool temperate conditions; avoid prolonged exposure to temperatures above 28°C
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Characteristics

  • Leaf: Linear, needle-like leaves arranged in opposite pairs, bright green and densely packed
  • Flower: Inconspicuous apetalous white blooms with 4 greenish-white sepals
  • Stem: Slender, creeping stems that root at nodes to form continuous dense mats
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Care Guide

Watering

Maintain consistent moisture; water when the top 1 cm of soil feels dry

Fertilization

Diluted balanced liquid feed every 4 weeks. Avoid over-fertilizing to prevent excessive foliage growth that disrupts mat formation

Composted coffee grounds tea:Use fully composted grounds diluted 1:40 with water for root drench; avoid applying undiluted grounds to prevent soil acidity spikes
Pruning
  • Trim back overgrown mats to maintain a neat, uniform ground cover
  • Remove dead or yellowing foliage to improve airflow and reduce fungal risk
  • Thin dense patches in humid conditions to prevent moisture buildup
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no adverse effects expected from ingestion or contact

Humans: No toxic effects reported in humans

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Garden Uses & Culture

Culture: N/A

Usage: Ground cover for rock gardens, pathway edges, and closed terrariums