Sow leeks from seed between February and April in the UK, indoors or in a seedbed. When seedlings are pencil-thick (June–July), drop them into 15cm-deep dibber holes and water in — no backfilling. Harvest from September right through to March.
A quick SoilCommander video on growing leeks at home in UK conditions — sowing, spacing, care and harvest in under a minute.
This guide covers how to grow leeks successfully — varieties, technique, spacing and troubleshooting. For exact sowing and harvest dates, see When to Plant Leeks in the UK, our quick timing reference.
Variety descriptions and performance ratings verified against RHS guidance and AGM trial data by the SoilCommander Growing Team.
Know your variety? See our full When to Plant Leeks UK guide →
How Leek Varieties Are Classified
UK leek varieties fall into three broad groups based on harvest timing. The key difference is frost hardiness — early varieties aren't built for prolonged hard frost, while maincrop varieties can stand in frozen ground for months without deteriorating. RHS leek guidance groups varieties by season rather than by shank length or colour, because harvest timing is the most practically useful distinction for UK gardeners.
| Group | Harvest | Frost Hardy | Shank Character |
|---|---|---|---|
| Early / Summer | August–November | Moderate | Long, slender, mild |
| Mid-season | October–January | Good | Medium, balanced |
| Late Maincrop / Winter | November–April | Excellent | Thick, robust, strong flavour |
Best Early Leek Varieties (Harvest August–November)
King Richard
The most widely grown early leek in UK gardens. Long, slender shanks up to 30cm, very mild flavour, attractive appearance. Harvest from August. Not frost-hardy — lift before November in exposed sites. Ideal for the south and for gardeners who want the earliest possible harvest.
Best for: Early harvest, show, mild flavour · Avoid if: You need winter hardiness
Jolant
An early variety with slightly more frost tolerance than King Richard. Medium-length shanks with a clean white base. Harvest September–November. A good choice where you want early crops but can't guarantee lifting before the first frost.
Best for: Early–mid harvest, moderate frost areas
Best Mid-Season Leek Varieties (Harvest October–January)
Oarsman
An outstanding modern leek with exceptionally long, clean white shanks — often 25–30cm of usable white. Excellent disease resistance, good frost hardiness, and very uniform presentation. Harvest October–January. Widely available and one of the best all-round mid-season choices.
Best for: Long shanks, uniformity, disease resistance
Poristo
A reliable mid-season variety with thick, well-flavoured shanks and excellent standing ability. Harvest November–January. Less prone to bolting in spring than some later varieties. Good choice for northern England and Scotland where the season is shorter.
Best for: Northern gardens, thick shanks, reliability
Best Late Maincrop Leek Varieties (Harvest November–April)
Musselburgh
The classic British winter leek, grown in UK gardens for over 150 years. Broad, thick shanks with a slightly blue-green flag (leaves). Excellent frost hardiness — stands in frozen ground without deteriorating. Harvest November through March. Widely available from most seed suppliers. The safest choice for first-time growers wanting a reliable winter crop.
Best for: Winter reliability, beginners, all regions
Bandit
Outstanding frost hardiness — handles temperatures well below −10°C without damage. Dark blue-green flags, thick white shanks, exceptional flavour after hard frost. Harvest December through April, making it one of the latest-standing leeks available in the UK. Essential for Scotland, northern England, and exposed sites.
Best for: Cold climates, late harvest, extreme frost hardiness
Porbella
A very late maincrop with high disease resistance and excellent standing ability through to April. Thick, well-blanched shanks and strong flavour. Less widely stocked than Musselburgh or Bandit but worth seeking out if you want to maximise your late-season harvest window.
Best for: Extending the season into April, disease resistance
Recommended Variety Mix for a Full UK Season
The most productive approach is to grow two or three varieties that cover different harvest windows rather than planting one variety at multiple times. A well-chosen mix gives you fresh leeks from August through to April:
| Variety | Sow | Harvest Window | Role |
|---|---|---|---|
| King Richard | Jan–Feb | Aug–Oct | Early harvest, mild flavour |
| Oarsman | Feb–Mar | Oct–Jan | Mid-season, long shanks |
| Musselburgh | Mar–Apr | Nov–Mar | Winter staple, frost-proof |
| Bandit | Mar–Apr | Dec–Apr | Late season, extreme cold |
What to Look for When Buying Leek Seed
- AGM status: Prioritise RHS AGM varieties for proven UK performance
- Harvest timing: Match variety to when you want to be harvesting, not when you sow
- Frost hardiness: Critical for northern gardens — check catalogue descriptions carefully
- Shank length: Long, slender shanks for show or restaurant use; shorter, thicker for flavour and yield
- Disease resistance: Leek rust is the main concern — some varieties (Oarsman, Apollo) show better resistance
Regional Planting Notes
The RHS notes hardy winter varieties are particularly suited to "colder locations" — gardeners in Scotland and northern England get the most reliable overwintering crop by choosing these cultivars over earlier, less hardy types. For full regional sowing and transplanting dates, see When to Plant Leeks UK.
Common Mistakes to Avoid
- Planting too shallow. Deep planting — around 15cm — helps leeks form the long white shank; RHS guidance confirms shallow planting shortens it.
- Wetting the foliage when watering. This encourages leek rust — water at soil level instead.
- Skipping earthing up. Missing this step means missing out on developing the prized white portion of the leek.
Plan Your Full Leek Season
The SoilCommander UK Vegetable Garden Planner includes variety-specific sowing and harvest timing for leeks alongside all your other crops — designed for UK gardens and allotments.
Get the Garden PlannerFrequently Asked Questions
What is the best leek variety for UK beginners?
Musselburgh is the most reliable choice for beginners — it's widely available, fully frost-hardy, produces thick shanks that are easy to harvest, and has been grown in British gardens for over 150 years. If you want to extend into spring, add Bandit as a companion variety.
What is the difference between early and maincrop leeks?
Early varieties (like King Richard) are harvested August–November and have longer, more slender shanks and milder flavour. They are not fully frost-hardy. Maincrop varieties (like Musselburgh and Bandit) stand in the ground through winter, developing stronger flavour after frost, and can be harvested through to April.
Which leek varieties have RHS AGM status?
UK leek varieties with RHS AGM recognition include King Richard, Oarsman, Poristo, Bandit, and Porbella, among others. The full list is on the RHS website. AGM status means the variety has been independently trialled and proven in UK conditions.
Can I grow leeks in Scotland?
Yes — leeks are one of the best crops for Scottish conditions. Choose fully frost-hardy maincrop varieties like Musselburgh and Bandit, sow indoors from late January or February, and transplant in June. They stand through the coldest Scottish winters without fleece or protection.
Browse sowing dates for all crops in the UK vegetable planting calendar · See exact sowing and transplanting dates in the when to plant leeks UK guide · Explore all UK vegetable growing guides
Last updated 18 July 2026
How To Grow Leeks In The UK
To grow leeks in the UK, sow seeds in late winter or spring, grow seedlings on until they are sturdy, then transplant them into prepared soil with enough space to thicken. Keep leeks watered in dry weather, weed around young plants, and harvest from late summer through winter depending on the variety and sowing time.
For detailed month-by-month timing, see when to plant leeks in the UK. Use the UK Vegetable Garden Planner PDF to track sowing dates, transplanting dates, bed positions, and harvest notes.
Tools That Help With This Crop
Use these links when the guide moves from reading into sowing, planting, watering, and keeping the crop healthy.
Plan the next step
Use the printable UK Vegetable Garden Planner to turn this guide into sowing dates, bed layouts, and weekly garden tasks.