How to Grow Leek

How to Grow Leeks From Seeds

Growing leeks from seeds allows you to select from a wider variety of cultivars and have control over the entire growing process. Here’s how to grow leeks from seeds:

1. Seed Selection: Choose high-quality leek seeds from a reputable source. Consider factors such as flavour, size, and disease resistance when selecting the varieties.
2. Timing: Start sowing leek seeds indoors 10-12 weeks before the last frost date in your region. This allows the seedlings to develop before transplanting them outdoors.
3. Seed Starting Trays: Fill seed starting trays or small pots with seed-starting mix. Moisten the mix before planting the seeds to ensure proper moisture levels.
4. Planting: Plant the leek seeds approximately 1 cm (0.4 inches) deep in the seed-starting mix. Space the seeds about 2-3 cm (1 inch) apart to allow room for each seedling to develop.
5. Indoor Care: Place the trays in a warm location or use a seedling heat mat to encourage germination. Keep the soil consistently moist but not waterlogged. Seedlings typically emerge within 14-21 days.
6. Transplanting: Once the leek seedlings have grown to a suitable size (approximately 15 cm/6 inches tall) and the soil is ready, transplant them outdoors. Space the seedlings 15-20 cm (6-8 inches) apart in rows with 30-45 cm (12-18 inches) between the rows.
7. Outdoor Care: Ensure the leek plants receive full sun or partial shade, depending on the climate in your region. Water the plants regularly, keeping the soil evenly moist. Mulching around the plants helps retain moisture and suppresses weed growth.
8. Fertilisation: Apply a balanced organic fertiliser according to the manufacturer’s instructions. Feed the plants every 4-6 weeks to provide them with the necessary nutrients.
9. Pest and Disease Management: Monitor the leek plants for pests such as onion maggots or leaf miners. Inspect the leaves regularly and use organic pest control methods to manage any infestations. Keep the area around the leeks clean and free of debris to minimise disease risks.
10. Harvesting: Harvest leeks when they have reached the desired size. Typically, leeks are harvested when they are around 2.5-5 cm (1-2 inches) in diameter and 15-30 cm (6-12 inches) in length. Gently loosen the soil around the base of the leek and carefully lift it out of the ground. Trim the roots and remove any damaged outer leaves before using the leek in your recipes.