Semensol summer mix - Green manure seeds

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per pack of 100 seeds approximately (500g)

24,90 €

Sku: 215431

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This plant carries a 6 months recovery warranty

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A mixture of green manure specifically designed to cover the soil between two crops in the summer. This helps to limit the appearance of weeds while avoiding leaving the soil bare. The plants in this mixture naturally provide humus and fertiliser to the vegetable garden. It should be sown in the spring on an unused plot or between two rows of vegetables. Bury after shredding in the autumn.

Ease of cultivation

Beginner

Soil moisture

Moist soil

Germination time (days)

14 days

Sowing method

Direct sowing

Sowing period March to May

JAN J

FEB F

MAR M

APR A

MAY M

JUN J

JUL J

AUG A

SEP S

OCT O

NOV N

DEC D

Description

The Semensol Summer Mix allows you to cover the soil and limit the appearance of weeds while providing natural fertiliser for the vegetable garden. It promotes the formation of humus and naturally enriches the soil with organic plant matter while reducing the growth of weeds. It helps soil preparation, prevents it from remaining bare, and protects it from bad weather. This product is suitable for organic farming. It can be sown between two rows of crops when the vegetable garden is in full swing or sown on an unused plot.

The Semensol Summer Mix is composed of mustard, buckwheat, phacelia, and wild oats. The optimal sowing period is in spring. Its main advantage is enriching the soil. It is thus called a green manure. These fertilisers help retain the soil's richness by providing it with organic matter, while also preventing weeds. This mix helps combat soil erosion.

The box of mix holds 500 g of seeds, which can cover an area of 100 m². It is recommended to shred the vegetation before burying it in autumn. Sown between two crops, it naturally feeds the vegetables by providing organic matter that will transform into humus and fertiliser. Sow it on bare plots or between rows of vegetables, on cultivated soil, and it will quickly provide an effective cover over large areas.

Green manures are often used in organically cultivated gardens and have many advantages. They nourish and improve the soil by providing various nutrients and stimulating the soil's microbial life. Their roots will loosen, break up, and aerate the soil. The vegetative cover protects the soil from leaching (nutrient loss in sandy soil), rain compaction (formation of a crust in loamy soil), and erosion (caused by runoff in case of heavy rain on sloping terrain) and helps limit weed growth. Finally, green fertilisers are often nectar-rich and attract pollinators.

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Family sheet

Modified the 5 November 2025 by Solenne 10 min.

White mustard: sowing, growing

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Cultivated in France since the 14th century, white mustard, Sinapis alba, is an annual herbaceous plant that produces large pale yellow seeds used in the making of strong mustard. While their taste is bitter, it is less pungent than that of black or brown mustard. Grown as a green manure, Sinapis alba transforms into organic matter once destroyed by frost or by crushing, which naturally enriches the soil. White mustard covers the ground with its dense clumps, and leaves no room for weeds that it smothers. Its root system also allows water and air to penetrate the soil well, and effectively retains nitrates. This helps prevent pollution of groundwater. The roots of mustard have properties similar to garlic. They are thus a very effective and natural bactericide and nematicide. The plant therefore allows for the disinfection and sanitisation of the soil for a future vegetable garden. Mustard in general includes species from the genus Sinapis, as is the case with white mustard, and species from the genus Brassica. The Sinapis alba (white mustard) is the most suitable as a condiment, although Brassica nigra (black mustard) is also used for this purpose. Prepared mustard is generally made using a mixture of white mustard seeds and black mustard seeds, which are mixed with vinegar, must, or verjuice. [caption id="attachment_86417" align="aligncenter" width="1172"]<a href="https://www.promessedefleurs.com/blogwp/wp-content/uploads/2020/11/Graines-de-moutarde-blanche-et-noire-1.jpg"><img class="wp-image-86417 size-full" src="https://www.promessedefleurs.com/blogwp/wp-content/uploads/2020/11/Graines-de-moutarde-blanche-et-noire-1.jpg" alt="White and black mustard seeds" width="1172" height="780" /></a> Mixture of white mustard seeds and black mustard seeds.[/caption] With a melliferous flowering, white mustard is also effective in repelling aphids in the garden. It is grown in open ground in sunny or semi-shaded conditions. Easy to grow, Sinapis alba requires very little maintenance, limited to light watering to keep the soil moist. Here are all our tips on this perfect green manure to improve the quality of your soils.

Harvest

Type of vegetable Green fertilizer

Size of vegetable Medium

Plant habit

Growth rate very fast

Foliage

Foliage persistence Annual

Foliage colour medium green

Botanical data

Origin

Cultivar or hybrid

Annual / Perennial

Annual

Product reference • 21543

Planting and care

Sow in spring by broadcasting on raked and loosened soil. Cover the seeds with soil by raking, firm the soil with the back of the rake, and water with a fine rain.

Does not require any specific maintenance or watering once growing. Should be destroyed at the end of summer. It is advisable to shred the crop before burying it in autumn.

Seedlings

Sowing period March to May

Sowing method Direct sowing

Germination time (days) 14 days

Care

Soil moisture Tolerant

Disease resistance Good

Pruning No pruning necessary

Intended location

Type of use Vegetable garden

Hardiness Hardy down to -23.5°C (USDA zone 6a) Show map

Ease of cultivation Beginner