White Mignonette (Reseda alba)

White Mignonette

Reseda alba

Its sweet-scented blooms carry old-garden charm, a delicate cloud of tiny white flowers. Biennial or perennial ornamental herb; common name: white mignonette.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in bright, direct sunlight with some midday shade in hot climates
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Watering Water deeply when top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Tolerates mild frost down to 5°C; prefers 15–25°C for optimal growth and blooming
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Characteristics

  • Leaf: Narrow lanceolate to oblong leaves, arranged alternately along stems, pale green with smooth margins.
  • Flower: Dense terminal racemes of tiny, creamy-white, four-petaled blooms with a honeyed fragrance.
  • Stem: Slender, branching green stems with fine pubescence.
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; increase frequency during extreme heatwaves

Fertilization

Light, balanced organic feed every 4 weeks. Discontinue fertilization in late autumn to prepare plants for dormancy

Eggshell powder topdress:Sprinkle finely ground, dried eggshells on soil surface; gently work into top 1 cm of soil to boost calcium levels without burning roots
Pruning
  • Deadhead spent flower racemes regularly to encourage continuous blooming through the growing season
  • Trim back leggy stems in mid-summer to promote bushier, more compact growth
  • Cut back to basal growth in late autumn to prepare for overwintering in mild climates
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported adverse effects from ingestion or contact

Humans: No known toxicity to humans; safe for handling and proximity

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Garden Uses & Culture

Culture: Associated with old-fashioned cottage gardens; symbolizes gentle remembrance and quiet beauty

Usage: Ornamental garden plant; cut flower for fragrant indoor bouquets