Brown Mustard (Brassica juncea)

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Sunlight Full sun to partial shade; full sun promotes robust leaf growth, while partial shade prevents bolting in hot climates

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Watering Keep soil consistently moist but well-drained; avoid waterlogging to prevent root rot

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Temperature Hardy to light frost; grows best in 15–25°C; extreme heat triggers premature bolting

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Leaf: Broad, lobed or serrated leaves with peppery taste; variable green to purple hues
Flower: Small, four-petaled yellow flowers in terminal racemes
Stem: Erect, branching green stems with fine, sparse hairs

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Watering

Water deeply when top 2 cm of soil dries out; maintain consistent moisture

Fertilization

Apply balanced, nitrogen-rich fertilizer every 2 weeks. Avoid over-fertilization to prevent bitter-tasting leaves

Banana peel tea：Soak chopped banana peels in water for 3 days; dilute 1:10 with water for root drenching to support leaf growth and reduce bitterness

Pruning

Harvest outer mature leaves regularly to encourage continuous new growth
Remove emerging flower stalks promptly to delay bolting and extend harvest period
Trim yellowing or damaged leaves to maintain plant health and airflow

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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 seeds are widely consumed in cuisines

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Culture: Widely used in Indian, Chinese, and Southeast Asian cuisines; valued for its peppery flavor and nutritional content

Usage: Edible leafy greens; seeds processed into mustard condiment; cover crop to improve soil fertility