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Organic White Mustard seeds, Green Manure

Sinapis alba
Cultivated mustard, salad mustard, yellow mustard

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White mustard is a very fast-growing annual green manure, ideal for covering a vacant plot, trapping nitrates, and producing a large amount of organic matter in a short time. It loosens heavy soils and smothers many weeds. Sow from March to September, then mow 6 to 8 weeks later, before it goes to seed, to dig it in or leave it as mulch. A condiment plant, its seeds are used to make mild mustard, and its young leaves can be used in cooking.
Ease of cultivation
Beginner
Height at maturity
50 cm
Spread at maturity
20 cm
Dry resistance
Average
Germination time (days)
8 days
Sowing method
Direct sowing
Sowing period March to September
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F
M
A
M
J
J
A
S
O
N
D
Flowering time June to September
J
F
M
A
M
J
J
A
S
O
N
D

Description

Organic White Mustard is one of the most versatile green manures for the vegetable garden. It is very fast-growing, germinates quickly and forms a dense cover in a few weeks that protects the soil, slows the development of weeds, and captures residual nitrogen. It is also a major condiment plant: its seeds are used to make mild mustard, its young leaves can spice up salads, and its sprouted seeds are part of a healthy and fragrant cuisine.
In the garden, it is mainly used as a catch crop before hungry vegetables like tomatoes, squashes, potatoes or strawberries, alone or mixed with legumes.

Sinapis alba, white mustard, belongs to the Brassicaceae family. It is an annual plant native to North Africa, temperate Europe, and western Asia, as far as China; it has become widespread in cultivated fields, fallow land, and roadsides in temperate regions.
The plant has an erect, branching habit, more or less hairy stems, and a taproot system that breaks compact soils and explores deeper layers. The deeply cut basal leaves contrast with the upper leaves, which are smaller with rounded lobes. The inflorescences are clusters of small yellow flowers, visible from late spring to early autumn depending on the sowing date; they are nectar-rich and visited by many pollinators.
The fruits are bumpy siliquas, bristly with hairs, containing small yellowish seeds rich in glucosinolates, notably sinalbin, which gives them their pungent flavour, though they are milder than black mustard. 
These seeds are used to prepare table mustards, oils, pickles, and also as sprouting seeds.
In traditional medicine, white mustard has been used internally, in small doses, as a condiment to stimulate appetite and digestion, and externally as rubefacient poultices to "warm" painful areas; these uses, however, fall under herbalism and require professional advice.

In the garden, white mustard is grown for its ecological qualities. It can be sown from spring to early autumn, then mown before or at the very start of flowering to prevent seed set and unwanted regrowth. Chopped and incorporated or simply left as mulch, its standing crop adds organic matter, improves soil structure, promotes water infiltration, and gradually releases nutrients.
Like many brassicas rich in glucosinolates, white mustard has an interesting biofumigation effect against certain soil nematodes and fungi when the vegetation is finely chopped and quickly turned into the soil.
However, avoid placing it just before or after crops from the same family (cabbages, radishes, turnips, oilseed rape) to limit the risk of specific diseases and pests.

Historically, this white mustard appears in the Capitulary de Villis in the Middle Ages as a recommended vegetable and condiment plant, and ancient medical texts frequently cite it for its "mustard" poultices on the chest or painful joints, showing just how long it has been a companion in gardens.

Organic or 'AB' seeds come from plants grown in organic agriculture (without the use of phytosanitary products). They undergo no treatment after harvest. These seeds are suitable for organic market gardening.

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White mustard: sowing, growing
Family sheet
by Solenne 10 min.
White mustard: sowing, growing
Read article

Harvest

Type of vegetable Green fertilizer
Size of vegetable Medium

Plant habit

Height at maturity 50 cm
Spread at maturity 20 cm
Growth rate very fast

Foliage

Foliage persistence Annual
Foliage colour medium green

Botanical data

Genus

Sinapis

Species

alba

Family

Brassicaceae

Other common names

Cultivated mustard, salad mustard, yellow mustard

Botanical synonyms

Brassica alba, Eruca alba, Leucosinapis alba, Rhamphospermum album

Origin

Western Europe, Central Europe, Eastern Europe, Southern Europe, North Africa, China, West Asia

Annual / Perennial

Annual

Product reference • 25437

Planting and care

Sowing Organic White Mustard:

Sow White Mustard from March to September by broadcasting, at a rate of 2.5 g per m2, on soil cleared of weeds and stones, raked over the surface. Cover the seeds with a rake. Germination typically takes between 5 and 10 days.

Cut after full development but before going to seed.

Care:

Mustard is a hardy plant that requires neither care nor watering during its growth.

Seedlings

Sowing period March to September
Sowing method Direct sowing
Germination time (days) 8 days

Care

Soil moisture Tolerant
Disease resistance Good
Pruning No pruning necessary

Intended location

Type of use Vegetable garden
Ease of cultivation Beginner
Soil ordinary, well-prepared
Exposure Sun
Soil pH Any
Soil type Silty-loamy (rich and light), Moist soil

Planting & care advice

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