Planting leeks involves a few key steps to ensure a successful crop. Here's a guide on how to plant leeks:

1. Timing: Leeks are typically planted in late winter to early spring, around 8-10 weeks before the last expected frost. This allows them to mature during the cooler months.

2. Seed Starting: Start leek seeds indoors in a seed tray or pots filled with a seed starting mix. Sow the seeds about 1/4 inch deep. Keep the soil consistently moist, and provide sufficient light or a grow light for seedlings.

3. Transplanting: Once the leek seedlings are about 6-8 inches tall and have a pencil-thin thickness, transplant them into the garden. This is usually done when the soil is workable and temperatures have slightly warmed.

4. Soil Preparation: Leeks prefer well-drained, fertile soil. Work in organic matter such as compost to improve soil structure. Leeks also benefit from a slightly acidic to neutral pH.

5. Planting Depth: Plant leek seedlings in a trench to encourage blanching. Dig a trench about 6 inches deep and place the leek seedlings at the bottom, spaced 6 inches apart. Fill the trench gradually as the leeks grow to blanch the stems.

6. Spacing: Space rows of leeks about 12-18 inches apart to allow for adequate air circulation.

7. Watering: Keep the soil consistently moist, especially during dry spells. Leeks need ample water for proper growth.

8. Sunlight: Leeks thrive in full sun, although they can tolerate partial shade. Ensure they receive at least 6-8 hours of sunlight daily.

9. Fertilizing: Leeks are moderate feeders. Incorporate a balanced fertilizer at planting and side-dress with compost during the growing season.

10. Weeding: Keep the area around leeks free from weeds, as competition can hinder their growth.

11. Hilling: As the leeks grow, you can hill soil around the base of the plants to further encourage blanching.

12. Harvesting: Harvest leeks when they have reached the desired size, typically in late fall or winter. Use a garden fork to carefully lift them from the soil.

By following these steps, you can successfully plant and grow leeks, enjoying their mild and versatile flavor in various culinary dishes.