Leek Seeds | Hardy, Frost-Tolerant Winter Crop

Leek

Leeks (Allium ampeloprasum var. porrum) are hardy, cool-season alliums valued for their long, mild-flavoured stalks and ease of storage. At Seedmart, we offer heirloom bulk leek seeds selected for strong germination, frost tolerance, and adaptability across Australian climates.

Perfect for autumn and winter growing, leeks thrive in fertile, well-drained soil and flourish with steady moisture. They’re a staple for soups, stir-fries, and winter dishes. Our leek seeds are non-GMO and chosen for reliability, quality, and flavour — delivering a robust, productive crop for home gardeners and market growers alike.

Leek Large American Flag Vegetable Seeds
from $6.99 AUD incl gst Select options This product has multiple variants. The options may be chosen on the product page

Why Grow Leeks?

✅ Cool-season crop with sweet, mild oniony flavour
✅ Long harvest window—plant in autumn/winter and harvest into spring
✅ Excellent storage and versatility in the kitchen
✅ Easy to grow and frost-hardy—a winter garden staple

Where Can You Grow Leeks?

Leeks prefer rich, loamy, well-drained soils in full sun. In cold temperate regions, sow seeds from August to September; in warm temperate areas, sow from May to February; and in subtropical zones, from March to August. Seed germinates best at soil temperatures between 13–24 °C, taking 7–10 days. Sow in trays and transplant after 8–10 weeks.

Health Benefits of Leeks

Leeks are nutritious and low-calorie, offering dietary fibre, vitamin C, K, manganese, and antioxidants. Their mild oniony taste complements a variety of dishes.

Growing Tips

Sow seeds 0.5 cm deep in seed trays or directly. Thin or transplant seedlings spaced 10–15 cm apart in rows 30–45 cm apart.
Use trench planting or hilling to blanch the stems—this encourages long, white bases.
Keep soil consistently moist and remove weeds; mulch to retain moisture and suppress weeds.
Watch for rust and thrips; ensure good airflow, avoid over-fertilisation, and remove affected leaves early.

Popular Leek Varieties

Bulgarian Giant: Long, thick stems with mild flavour, ideal for autumn and winter harvests.
Giant Musselburgh: Scottish heirloom with large, tender stalks—great for deep autumn into spring.

Ready to Grow Leeks?

Our leek seeds are selected for strong germination, resilience, and flavour in Australian conditions. Shop the full range above to plant hearty, long-lasting leeks for your winter garden.