Giant Polycnemum (Polycnemum majus)

Giant Polycnemum

Polycnemum majus

Delicate waxy foliage glows softly in sunlight. Low-growing herbaceous perennial; common name: Giant Polycnemum.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial sun; tolerates coastal salt spray and windy conditions
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Watering Allow top 2–3 cm of soil to dry between waterings; highly drought tolerant
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Temperature Hardy to mild frost; tolerates high summer heat and coastal temperature fluctuations
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Characteristics

  • Leaf: Small, fleshy cylindrical waxy leaves arranged in dense whorls along stems
  • Flower: Tiny, inconspicuous greenish-white flowers clustered at stem nodes
  • Stem: Slender, succulent green stems branching densely from the base
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Care Guide

Watering

Keep soil slightly moist; avoid overwatering to prevent root rot

Fertilization

Diluted balanced liquid feed once every 4 weeks. Avoid high-nitrogen fertilizers to prevent leggy growth

Banana peel compost tea:Use fully composted banana peels; dilute 1:20 with water for root drenching to avoid nutrient burn
Pruning
  • Trim back leggy stems in early spring to encourage compact, bushy growth
  • Remove dead or yellowing foliage to maintain a tidy mat-forming habit
  • Avoid heavy pruning to preserve the plant's natural low-growing structure
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Coastal erosion control; rockery ground cover; drought-tolerant ornamental