Porto Campion (Silene portensis)

Porto Campion

Silene portensis

Its ballooning calyx holds summer’s breath, a delicate beacon in coastal meadows. Annual Caryophyllaceae herb native to Iberia.

Full sun
2/week
Beginner
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Plant Needs

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Sunlight Prefers full sun; tolerates partial shade but blooms best in full exposure
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Watering Requires moderate watering; keep soil slightly moist during growing season
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Temperature Thrives in mild to warm temperatures; tolerates light frost
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Characteristics

  • Leaves: Opposite, linear to lanceolate, 2–6 cm long, glabrous;
  • Flowers: 5 petals, white to pale pink, deeply bifid; calyx inflated, prominently veined;
  • Stems: Slender, erect, often reddish-tinged, sparsely hairy;
  • Fruit: Capsule enclosed in persistent inflated calyx.
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Care Guide

Watering

Water moderately when topsoil dries

Fertilization

Light application of balanced organic fertilizer. Fertilize sparingly to encourage flowering without excessive foliage growth

Banana peel compost:Dry and chop banana peels; bury around plant base to enrich soil; avoid fresh peels to minimize odor
Pruning
  • Remove spent flowers to prolong bloom;
  • Trim leggy stems to promote branching;
  • Cut back after flowering to maintain shape;
  • Remove any diseased foliage promptly.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Not listed as toxic to cats per ASPCA

Humans: No known toxicity to humans under normal contact or ingestion

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Garden Uses & Culture

Culture: In coastal Portuguese gardens, its airy flowers mark the turning of spring to summer in Western tradition

Usage: - Ornamental in rock gardens and coastal plantings; - Pollinator-friendly nectar source; - Suitable for wildflower meadows.