
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.
Step-by-step instructions for growing Leek
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 2nd March - 17th March.
Sow seeds thinly in modules or a seed tray around 16th January - 17th March, about deep. Keep them at and water gently so the compost stays moist but not sodden.
Move seedlings on when they are large enough to handle, from 8th March. Pot them into small modules or deeper trays so the roots can develop without crowding.
Set plants outside for a few hours a day before planting out. Do this over 2nd April - 16th April so they adjust to wind, sun and cooler nights without checking growth.
Plant sturdy seedlings into deep dibbed holes around 2nd April - 16th May, 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.
Keep the rows weed-free and draw soil up around the stems as they thicken. Start from 24th April and repeat as the plants grow, keeping moisture steady in dry spells so the stems stay tender and pale.
Lift leeks from 21st September once the stems are a usable size, then keep picking through 19th February. Use a fork to loosen the soil before pulling, and take what you need rather than clearing the bed at once.
Tap a plant to see why it works (or doesn't) with Leek.
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.
Popular varieties of Leek to consider
A reliable open-pollinated leek with long, sturdy stems and good winter hardiness.
A traditional variety that gives long white shanks and dependable flavour.
A hardy winter leek that stands well and crops for a long period.
A very cold-tolerant leek suited to late cropping and winter harvests.
See how Leek timing shifts in other towns with different frost dates.