Growing Leeks from Sowing to Harvest



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Leeks are hardy enough to grow outdoors through winter in most regions. You can make the harvest period last from autumn right through to spring by carefully selecting a mix of varieties. Look out for varieties described as ‘rust resistant’ if this fungal disease is a problem in your area.

Start sowing under cover from late winter. Our Garden Planner provides personalized sowing, planting, and harvesting times for crops in your location, using data from your nearest weather station.

Sowing Leeks

Sieve potting soil into pots or trays. Gently tamp it down. Sow the seeds about an inch apart (or sow two seeds per cell in a plug tray). Sieve more potting soil over them to cover, and then water them. Keep the potting soil moist but not too wet as the seeds germinate and grow on.

Place early sowings on a sunny indoor windowsill or in a greenhouse. As they grow, you can separate the seedlings into individual pots if you wish.

Planting Leeks

Transplant your leeks into well-dug soil when they are 6 to 8 inches tall. Make sure to harden them off first by leaving them outside for increasingly longer periods over a week or two.

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