Sweet Wallflower (Erysimum odoratum)

Sweet Wallflower

Erysimum odoratum

Fragrant clusters bloom in cool seasons, a cheerful splash of color in borders. Herbaceous perennial; common name: Sweet Wallflower.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; full sun promotes the most abundant flowering, with partial shade tolerated in hot climates
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Watering Water when the top 2 cm of soil is dry; avoid overwatering to prevent root rot in heavy soils
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Temperature Hardy to -10°C; prefers cool growing conditions, with reduced vigor in prolonged heat above 25°C
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Characteristics

  • Leaf: Narrow, lance-shaped, gray-green, slightly hairy foliage
  • Flower: Dense terminal clusters of four-petaled flowers in yellow, orange, or purple hues
  • Stem: Upright, branching stems with fine pubescence
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Care Guide

Watering

Keep soil evenly moist during active growth and flowering

Fertilization

Light, balanced feed once monthly. Use diluted, low-nitrogen fertilizer to promote flower production over foliage growth

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle 1 teaspoon per plant around the base, avoiding direct contact with stems to prevent irritation
Pruning
  • Deadhead spent flower clusters regularly to encourage extended blooming
  • Cut back stems by half after flowering to promote compact, bushy growth for the next season
  • Remove yellowing or damaged foliage to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No known toxicity to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden plant; cut flower for small, fragrant bouquets