Round-headed Rampion (Phyteuma orbiculare)

Round-headed Rampion

Phyteuma orbiculare

Tight spherical blooms cluster like purple constellations in meadows. Herbaceous perennial; common name: Round-headed Rampion.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open meadow conditions with unobstructed morning sun
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Watering Water deeply when top 2–3 cm of soil is dry; tolerate short periods of drought once established
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Temperature Hardy to -15°C; withstand cool temperate summers, avoid prolonged temperatures above 28°C
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Characteristics

  • Leaf: Basal rosette of lanceolate, softly hairy leaves; stem leaves are smaller and narrower
  • Flower: Dense spherical heads of tiny violet-blue, bell-shaped flowers
  • Stem: Slender, upright, sparsely hairy stems branching near the top
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Care Guide

Watering

Keep soil consistently moist during active growth; avoid waterlogging

Fertilization

Diluted balanced feed once every 4 weeks. Use low-nitrogen feed to promote bloom production

Eggshell powder top-dress:Crush dried eggshells into fine powder; sprinkle lightly on soil surface and gently work into top layer to avoid disturbing roots
Pruning
  • Deadhead spent flower heads to encourage occasional secondary blooms
  • Cut back faded foliage to ground level in late autumn
  • Thin overcrowded clumps in early spring to improve airflow
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: No documented toxicity to cats per ASPCA records

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental meadow and rock garden plant; occasional cut flower