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Trefoil Seeds - Green Manure

Botanical - Medicago lupulina


50g (covers 22.5m²) at 2.22g per m²
Usually despatched within 24 hours
See "Delivery Charge" tab below
Current Stock:
Out of stock
Price £2.14

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Sorry but this item is currently unavailable.

Please check back at a later stage.

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50g covers 22.5 metre square (approx 34000 seeds) at 2.22g per m²

Other Names - Yellow Trefoil…

Trefoil has a similar appearance to clover. A very useful ground covering green manure that has the ability to fix nitrogen in its root nodules. Excellent for growing over the winter months, filling in any bare unused soil in the garden.

  • Has the ability to fix nitrogen.
  • Excellent for intercropping.
  • Can be left to cover bare areas over the winter months.

Suitable For - Green manure in vegetable and fruit gardens, groundcover, weed suppressant, wildlife gardens

Sowing Months - March - August

Flowering Months - N/A

Growing Period - 8 - 12 weeks, longer if grown over the winter months

Soil Preperation

Remove weeds and large stones. Lightly dig if needed, rake the soil to a fine tilth.

General Information
Habit Biannual often grown as an annual Type Legume
Height 15 - 20 cm Hardiness Hardy
Position Full sun, partial shade Soil Ph Alkaline soil
Soil Type Light, dry soil Coverage 2.22 g per 1 metre square
Distance Between Plants Scatter evenly Depth 1 cm
RHS Bee Friendly No RHS Award Winner No

Sowing Guide

Scatter the seeds as evenly as possible on the surface of the prepared seed bed.
Lightly rake the surface to cover the seeds.
Water the newly sown seeds well.

Growing On

Water the young seedlings well until established.
Established plants need regular watering especially in dry conditions.
Avoid overwatering as trefoil dislikes sodden, waterlogged conditions.
Autumn sowings will survive as small plants over the winter months. Once spring arrives they will start to grow once again.

Digging In

Cut and dig in the plants 2 - 3 months after sowing or anytime before flowering. Autumn sowings will be ready for cutting the following mid to late spring.
Cut with a garden spade, sheers or if the area is large, cut the plants with a strimmer.
Dig in using a sharp spade to the depth of 20 - 25 cm. Or if preferred use a rotovator to incorporate the organic matter.
Avoid growing any vegetables in the soil for at least 3 - 4 weeks after digging in so that the green manure has time to decompose.


Try growing alongside tall growing vegetables such as beans and sweet corn to help retain moisture in the surrounding soil and to supress weed growth.

Delivery Information

All products on this website are for delivery to the UK only.

(Including Northern Ireland, the Highlands & Islands, Scilly Isles, Channel Isles and the Isle of Man). Delivery charges to these areas are the same as UK mainland stated below (with no additional surcharge). Delivery however may take longer than the times stated due to weather, distance etc.)

FREE DELIVERY on all orders over £9.98

When applicable, free 2nd class delivery will be automatically calculated at checkout.

STANDARD DELIVERY - Royal Mail 2nd Class (3 - 5 working days) - £0.95

For orders under £9.98, the "Standard Delivery" charge will be added automatically at checkout.

FAST DELIVERY - Royal Mail 1st Class (1 - 2 working days) - £1.52

If preferred please select this delivery option at checkout.

For further information please visit our Delivery, Postage & Packaging page.

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For full details please visit our Your Right to Cancel page.

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If however you receive goods that have been damaged, incorrect or missing, let us know within 72 hours of receiving the goods and we will either fully refund you (including postage costs), promptly send you a replacement or credit your Groseeds account, depending on your preference.

For full details, including how to contact us, please visit our Returns & Refunds page.

Faulty Goods.

We guarantee to supply you with the finest quality seeds in prime condition.

All products sold by Groseeds come with a 365 Days 100% Satisfaction Guarantee (from the date of purchase). For further information please visit our 12 Month Guarantee page.

If however within the 12 months you find the goods to be faulty please contact us ASAP so that we can resolve the issue promptly. Full instructions, including how to contact us can be found on our Returns & Refunds page.

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