Loading... Please wait...
UK Delivery 95p. Free On Orders Over £12.50

Leek Seeds - Below Zero F1

Image 1


Seed Count:
35 Seeds
Usually despatched within 24 hours
See "Delivery Charge" tab below
Current Stock:
Out of stock
Price £1.78

Sorry but this item is currently unavailable.

Please check back at a later stage.


Sorry but this item is currently unavailable.

Please check back at a later stage.

Our Price Promise

If you find the exact same product cheaper elsewhere within 28 days of purchase we will refund you 2 times the difference! Click here for more details and terms & conditions.

12 Months Guarantee

If you are not satisfied with your purchase, let us know within 12 months of the purchase date for a full refund, replacement or a store credit. Click here for more details and terms & conditions.

35 Seeds.

Other Names -

  • A British bred variety producing pure white stems from November to May
  • Has extreme cold tolerance, can withstand the harshest of winters
  • Rust resistant variety

Suitable For - Vegetable plot, raised beds, grow bags, containers

Sowing Months - February - April

Harvest - November - May

Gardening is about finding the right balance! Try growing Companion Plants close by to help deter pests.

  • Leeks and celery grow well together.
  • Grow some carrots close by as leeks can help to deter or confuse the carrot fly.
  • Onions and shallots are good companions.

Soil Preperation

Leeks need a fertile and moisture retentive soil with a good amount of well rotted manure of compost added a few months before planting. Add a general purpose organic fertilizer 1 - 2 weeks before planting and remove any weeds from the area.

General InformationSowing & Planting Information
Habit Biennial, grown as an annual Module Grown & Transplants
Type F1 Distance between plants 20 cm
Position Full sun, sheltered Distance between rows 30 cm
Average height 45 cm Direct Sowing
Average spread 30 cm Sowing distance between plants 1 - 1.5 cm
Hardiness Fully hardy Distance between rows 30 cm
Overwintering Yes Sowing depth 1 cm - 1.5 cm
Soil Ph 6.5 - 7.0 Germination temperature 10 to 15℃
    Days to germination 14 - 21 days

Sowing Guide

Early Sowing/Module Sowing

In January - February sow 2 - 3 seeds per module. Place in a propagator at the temperature suggested above or if preferred place the tray in a clear polythene bag and seal. As soon as germination starts move to a cool (frost free) area with good daylight exposure, a windowsill or greenhouse is ideal.
When the seedlings are big enough to handle thin to one strong seedling per module. Keep the compost moist at all times but avoid overwatering.
Plant out when all risk of frost has passed. Harden off before planting out to help prevent shock.

Direct Sowing

Leek seeds are normally sown in a well prepared seedbed in March - April, then a few weeks later they are transplanted into their final growing position. Sow 1 seed every 1 - 1.5 cm at the depth and row distance suggested above. Cover the seeds with soil and water well. When large enough to handle thin the seedlings to 3 cm apart. Keep the strongest remove the weaker seedlings.
Weed often to keep competing plants under control as the seedlings at this stage will resemble blades of grass and can be easily smothered by unwanted plants. Water well in dry weather.

Growing On

When the leeks are around 20 - 25 cm tall (or as thick as a pencil) they are ready to be transplanted into their final growing position. Follow the suggested transplant distances above. If the soil is dry water the plants well the day before transplanting to help reduce stress. Leaver the roots out with a trowel, lifting clumps of plants. Carefully divide each plant, try to keep root damage to a minimum. Discard any small weak plants.
Some gardeners choose to trim the root ends at this stage. If the roots are long, trim to around 3 - 4 cm in length with scissors. This will help to ensure the roots are in contact with the bottom of the dibbed hole and prevent any overly long roots from poking out onto the soil surface.
To transplant, make a 12 - 15 cm deep hole with a 2 - 3 cm wide dibber. The dibbed holes in each row needs to be 10cm apart. Drop one leek onto each hole. Fill each hole to the top with water. Do not fill the holes with soil at this point (they will naturally fill up over the growing season). Water the leeks well especially in dry weather. They will benefit from a mulch of compost to help with moisture retention as moisture is very important in the development of leeks.
Weed regularly to keep competing plants under control. The stem part that was dropped into the dibbed hole when transplanting will be white (blanched) because of the exclusion of light. The length of the white stem can be increased further by gently, in stages, drawing some dry soil around the stems, increasing the height a little at a time. This should only be done when the plants are strong and well developed.


Leeks do not have to be left to grow large before eating - smaller baby leeks tend to have a better flavour. Start by harvesting the biggest plants in the row first. If the soil has had a good amount of organic material added it may be possible to gently pull the leeks out of the ground by hand alone. If however when pulling there is some resistance use a spade or fork to help leaver the leeks out to prevent the stems from snapping.
Firm the soil down again after harvesting so as not to disturb the growth of neighbouring leeks. Trim the tops and remove the roots. Winter and spring varieties are very hardy and can withstand severe frosts. They can be left in the ground until they are required.


The leaves of the Comfrey plant can be used to make a nutrient rich liquid fertilizer, used as a compost accelerator, a slug repellent and a nutritional mulch.

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.

Returns & Refunds

We like to be transparent with our customers, here are your rights as a consumer -

The 14 day cooling off period.

Under the 'Consumer Contract Regulation Act' you the consumer have the right to cancel a long distance order (such as a website order) at any time from the moment the order is placed up until 14 calendar days from the day after the goods are received.

So if for whatever reason you change your mind within this time and wish to return the goods, simply send us a 'Cancelation Form' (full details can be found on our Your Right to Cancel page). On receiving the undamaged goods back from you we will fully reimburse you with all payments received including the cost of standard delivery. You will however need to bear the cost of returning the goods back to us.

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

Damaged, Incorrect or Missing Goods.

We want you to be 100% delighted with your purchase.

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.

We want you to be 100% satisfied with your purchase. Any issues will be dealt with promptly, courteously and efficiently.