Leeks in Marloes

Allium ampeloprasum var. porrum

Leek
Leek · Allium ampeloprasum var. porrum

A hardy allium for the UK garden, best started under cover and planted out into firm, fertile soil. Keep the rows weed-free, water well in dry spells, and lift stems as you need them from autumn through winter and into spring.

45 cm · Full Sun · Moderate Water

Calibrated to Marloes · last frost ≈ 18 Mar

Sow indoors January to February, plant out March to April, harvest August to March. Frost risk December to March.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Sow indoorsYesYesNoNoNoNoNoNoNoNoNoNo
Plant outNoNoYesYesNoNoNoNoNoNoNoNo
HarvestYesYesYesNoNoNoNoYesYesYesYesYes

Growing guide

Step-by-step instructions for growing Leek

  1. 01

    Prepare the Bed

    1 Feb to 16 Feb

    Dig the bed well and work in compost before planting time. Leeks do best in moisture-retentive but free-draining soil, and a loose, stone-free tilth helps the stems grow straight around 1st February - 16th February.

  2. 02

    Sow Seeds Under Cover

    2 Jan to 1 Feb

    Sow seeds thinly in modules or a seed tray around 2nd January - 1st February, about deep. Keep them at and water gently so the compost stays moist but not sodden.

  3. 03

    Prick Out Seedlings

    7 Feb to 21 Feb

    Move seedlings on when they are large enough to handle, from 7th February. Pot them into small modules or deeper trays so the roots can develop without crowding.

  4. 04

    Harden Off

    4 Mar to 18 Mar

    Set plants outside for a few hours a day before planting out. Do this over 4th March - 18th March so they adjust to wind, sun and cooler nights without checking growth.

  5. 05

    Plant Out

    4 Mar to 17 Apr

    Plant sturdy seedlings into deep dibbed holes around 4th March - 17th April, leaving just the base of the leaves at soil level. Water in thoroughly at once, then let the soil settle naturally around the roots rather than firming hard.

  6. 06

    Weed and Earth Up

    26 Mar to 1 Dec

    Keep the rows weed-free and draw soil up around the stems as they thicken. Start from 26th March and repeat as the plants grow, keeping moisture steady in dry spells so the stems stay tender and pale.

  7. 07

    Harvest Leeks

    30 Aug to 31 Mar

    Lift leeks from 30th August once the stems are a usable size, then keep picking through 31st March. Use a fork to loosen the soil before pulling, and take what you need rather than clearing the bed at once.

Companion plants

Tap a plant to see why it works (or doesn't) with Leek.

Good companions

Plants to avoid

Why companion planting matters

Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.

Suggested varieties

Popular varieties of Leek to consider

Musselburgh

A reliable open-pollinated leek with long, sturdy stems and good winter hardiness.

Lyon

A traditional variety that gives long white shanks and dependable flavour.

Bandit

A hardy winter leek that stands well and crops for a long period.

Below Zero

A very cold-tolerant leek suited to late cropping and winter harvests.

Leek guides by town

See how Leek timing shifts in other towns with different frost dates.