Shore spurge (Euphorbia glauca)

Shore spurge

Euphorbia glauca

A resilient coastal dweller with striking blue-green foliage and deep red floral structures. Perennial coastal herb; other names: New Zealand sea spurge.

Requires full sun for best foliage color and compact growth.
1/week
Easy
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Plant Needs

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Sunlight Requires full sun for best foliage color and compact growth.
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Watering Highly drought-tolerant once established; requires well-draining soil and infrequent watering.
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Temperature Prefers mild coastal climates; tolerates light frost but needs protection from hard freezes.
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Characteristics

  • Leaves: Glaucous (blue-green), alternate, entire, obovate to elliptic, fleshy, closely packed along the stems;
  • Flowers: Cyathia surrounded by striking dark red to purple-black involucral glands, lacking true petals;
  • Stems: Erect, fleshy, pale green to reddish, exuding a milky white latex when broken or damaged;
  • Roots: Extensive creeping rhizomes adapted for stabilizing in shifting coastal sands.
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Care Guide

Watering

Water deeply but infrequently, allowing the soil to dry out completely between waterings.

Fertilization

Apply a light, low-nitrogen fertilizer to encourage root and foliage health without excessive weak growth.. Requires very little fertilization; over-fertilizing can harm the plant.

Banana Peel Tea:Steep chopped banana peels in water for 24-48 hours, strain, and dilute 1:1 with water. Use sparingly to provide a gentle potassium boost for root strength. Discard solids in compost to avoid foul odors and pests.
Pruning
  • Safety first: Always wear thick gloves and protective eyewear when pruning to avoid contact with the toxic, irritating milky sap;
  • Maintenance: Remove dead or dying stems at the base to encourage fresh basal growth;
  • Cleanup: Wash any tools immediately after use to prevent the latex from hardening and rusting the metal.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Toxic per ASPCA (Euphorbia spp.). Ingestion causes gastrointestinal irritation, and sap causes dermal/eye irritation.

Humans: The milky sap (latex) is highly irritating to the skin and eyes, and toxic if ingested.

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Garden Uses & Culture

Culture: N/A

Usage: Excellent for coastal erosion control, xeriscaping, rock gardens, and as a striking architectural container plant.