Sea Sandwort (Honckenya peploides)

Sea Sandwort

Honckenya peploides

It carpets coastal sands with tiny white blooms, a hardy dune guardian. Low-growing perennial succulent herb; common name: sea sandwort.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Requires full sun exposure; tolerates coastal salt spray and strong wind conditions
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Watering Drought-tolerant; water sparingly, allowing the sandy soil to fully dry between waterings
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Temperature Cold hardy; withstands freezing temperatures down to -20°C and warm coastal summer heat
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Characteristics

  • Leaf: Fleshy, linear to spatulate, bright green, arranged oppositely along trailing stems
  • Flower: Small, white, five-petaled, clustered in terminal cymes
  • Stem: Slender, trailing, rooting at nodes to form dense, low mats
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Care Guide

Watering

Water when top 2–3 cm of soil is completely dry; avoid overwatering to prevent root rot

Fertilization

No supplemental fertilization required; natural soil nutrients support growth. Fertilization may disrupt its low-growing, mat-forming habit

Dried banana peel powder:Crush fully dried banana peels into fine powder; dust lightly on soil surface once every 3 months to support stress tolerance
Pruning
  • Trim overgrown trailing stems in early spring to maintain compact mat form
  • Remove dead flower heads and yellowed foliage after flowering to improve appearance
  • Clear accumulated debris around plants to prevent pest harborage
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No known toxicity to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Coastal erosion control, low-growing ground cover for sandy gardens