Large American Flag Leek Seeds

An heirloom variety dating back to 1870, the Large American Flag leek was bred specifically to endure cold weather. This variety produces leeks of superior quality with blue-green foliage and white stems that are eight to ten inches long and two inches wide. The Large American Flag leek is a good addition to soups, stir-fries, stews and salads.

GROWING INSTRUCTIONS

As an ancient crop, cultivated for thousands of years, leeks are a somewhat overlooked vegetable. They are a pleasant, milder alternative to onions and are perfect in soups and stir frys. They are a long season crop but aren’t difficult to grow.

If starting indoors, plant seeds 10-12 weeks ahead of the last frost. Can be directly sown around your last frost date. Space seeds 2 cm apart in a flat and lightly cover with soil, about 1 cm. Lightly compress the seeds into place. Water gently and make sure potting soil remains moist. Locate seedlings in a sunny windowsill, under lights or into a greenhouse.

Keep the young green sprouts trimmed to encourage stockier plants. Cut new growth weekly, leaving only the bottom 6 cm. Harden off plants for two weeks leading up to the last frost. If the soil is light, loose and has been mixed with compost, leeks won’t require fertilizer.

Plant in a site that will get full sun. Make holes in the bed about the same depth as the leek stalks. Space holes 15 cm apart and leave 30 cm between rows. Gently plant seedlings into the holes and fill with water. Lightly cover the roots with soil but leave some of the stem exposed, this will aid in developing a long white stem.

It can take 100-120 days until leeks are ready to harvest, but be patient and let the leeks size up. In the last couple of weeks leading up to harvest, you can hill up the soil or wrap stems in paper/cardboard to extend and blanch the white usable portion of the crop. Pry with a garden fork and pull out by the greens when they are a suitable size. Harvest throughout the fall and winter, until the ground freezes.

QUICK FACTS

- Leeks are originally from Asia but have been a part of the Egyptian diet for at least 4000 years. They were also eaten in ancient Rome and their taste was considered more flavourful than garlic and onions.

- For a greater eating portion of extra-long blanched stalks, hill the plant with soil 2-3 times during the growing period, higher with each hoeing. 

- Leek seeds will remain viable for 2 years if stored in a cool, dark place, ideally between 4 and 10⁰C. After that, the germination rate may start to go down.