Hedge Mustard (Sisymbrium officinale)

Hedge Mustard

Sisymbrium officinale

It bears delicate yellow blooms, a hardy wild herb. Annual or biennial edible herb; common name: hedge mustard.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates poor, compacted soil conditions
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Watering Water moderately during establishment; drought-tolerant once roots are well-developed
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Temperature Hardy to -10°C; thrives in cool to temperate growing conditions
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Characteristics

  • Leaf: Basal rosette of lobed, hairy leaves; stem leaves are smaller, clasping the stem
  • Flower: Tiny bright yellow four-petaled blooms arranged in terminal racemes
  • Stem: Erect, branched, covered in fine, stiff hairs
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Care Guide

Watering

Keep soil slightly moist during active growth; avoid overwatering

Fertilization

Occasional diluted compost tea application. No regular fertilization required for healthy growth in native habitats

Composted eggshell powder:Sprinkle a thin layer around the base of the plant; avoid direct contact with stems to prevent irritation
Pruning
  • Deadhead spent flower racemes to encourage extended blooming
  • Trim back leggy stems to promote bushier, more compact growth
  • Remove yellowing basal foliage to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no known adverse effects from ingestion

Humans: Non-toxic; edible leaves and flowers are used in culinary and medicinal applications

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Garden Uses & Culture

Culture: N/A

Usage: Edible leaves and flowers used in salads, pesto, or as a medicinal herb for respiratory support