How to Grow White Mustard
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White Mustard
Sinapis alba
vegetableWhite mustard is a cool-season annual crop grown for its peppery seeds, sprouts, and tender greens. The plant produces small yellow flowers and round seed pods containing the pale seeds used in condiments and cooking. It's valued as both a cover crop and edible plant, with a long history in agriculture and cuisine.
When should you plant White Mustard in your zone?
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Example White Mustard timeline · Pittsburgh, PA (Zone 6b)
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Plant White Mustard
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest White Mustard
Around Jun 26≈ 70 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact White Mustard dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8; can be grown as cool-season crop in warmer zones
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Seedling
2-3 weeksCotyledons emerge within 5-10 days; first true leaves develop, plant is 1-2 inches tall
Keep soil consistently moist. Thin seedlings to proper spacing once true leaves appear
Vegetative
3-4 weeksPlant develops multiple lobed leaves, grows 6-12 inches tall; dense bushy growth
Maintain consistent watering. Can harvest greens at this stage for salads and sprouts
Flowering
2-3 weeksSmall yellow flowers appear on terminal racemes; plant reaches 24-36 inches tall
Continue regular watering. Flowers are attractive and edible; support tall growth if needed
Fruiting
3-4 weeksSeed pods develop along stems, elongated siliques 1-2 inches long containing 8-12 seeds
Reduce watering gradually. Pods turn from green to brown as seeds mature
Harvest
At maturity (day 70-90)Pods dry on plant and turn brown; seeds are pale tan and fully mature
Allow plants to fully dry in field if weather permits. Harvest entire plant or individual pods
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap, neem oil, or use row covers. Encourage beneficial insects
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Use row covers on young plants, apply diatomaceous earth, or use neem oil
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Hand-pick if populations are light. Use spinosad or neem oil for larger infestations
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Hand-pick eggs and adults. Use insecticidal soap or neem oil spray
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Use Bt (Bacillus thuringiensis), row covers on young plants, or spinosad
Uses
Mustard Condiment
CulinaryWhite mustard seeds are ground and mixed with vinegar, water, and spices to create prepared mustard condiments. They have a milder, slightly sweet flavor compared to other mustard varieties and are a key ingredient in yellow mustard. [source]
Sprouts and Microgreens
CulinaryYoung mustard sprouts are harvested at 2-3 weeks and used fresh in salads, sandwiches, and Asian cuisine. They have a peppery flavor and are highly nutritious, rich in glucosinolates and vitamin C. [source]
Tender Greens
CulinaryYoung mustard leaves can be harvested and cooked as greens or used raw in salads when tender. They add a peppery bite to dishes and are rich in calcium, iron, and vitamins. [source]
Cover Crop and Soil Amendment
HouseholdWhite mustard is planted as a cover crop in fall or between plantings to suppress weeds and improve soil structure. When tilled in, it adds organic matter and can help break pest cycles through biofumigation. [source]
Traditional Remedy
MedicinalMustard seed preparations have been used in traditional medicine for their warming and anti-inflammatory properties. Mustard plasters were historically applied topically to relieve muscle and joint pain. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
For greens and sprouts: harvest when 4-6 inches tall, cutting outer leaves or entire plant. For seeds: harvest when pods brown and dry in field, then thresh to extract seeds. Cut entire plant at soil level and hang in paper bag to dry and finish ripening seeds. Store dried seeds in cool, dry place
Fun Facts
- 🌱 White mustard has been cultivated for over 3,000 years and is mentioned in ancient Sanskrit texts and Biblical references.
- 🌱 The plant is a biofumigant, releasing compounds like sinigrin when tissues are damaged that can suppress certain soil-borne diseases and pests when tilled into soil.
- 🌱 A single white mustard plant can produce 50-100 seed pods, with each pod containing up to 12 seeds, making it highly productive for seed collection.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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