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Growing Leeks in The Northern Territory

Introducing Leeks

This lovely cool-weather crop is a member of the onion family and can only be grown during the cooler and drier months of the dry season in Top End. Its sweet, mild flavour makes it a useful and versatile addition to any vegetable garden.

Classic Mistakes

Don’t allow your soil to dry out or become too wet. Leeks do best with consistent, even moisture levels.

Sunlight

Grow in: Partial Sun - Full Sun

Leeks prefer full sun, but will tolerate some shade.

Soil Preparation

Add some compost, well-rotted manure and lime to your soil. Leeks like rich, well-draining soil with plenty of nitrogen.

Sowing Seed

Sow seed: All of April
Sowing depth: 10 mm

Leeks are usually sown in pots and then transplanted into the garden once they are big enough. Sprinkle the seeds over the soil, cover them lightly, and water well. Put them in a warm, light spot and be sure to keep the soil moist while the seeds germinate.

Planting

Plant seedlings: May-June

Plant your seedlings into 150 mm deep holes. Backfill the holes with soil or compost as the leeks grow. This will help to blanch the lower part of the stem. Seedlings are often clumped when you buy them and need to be separated before planting. Simply remove them from their container and rinse the soil off. Once the soil is off, they should separate easily. Trim the tops of the leaves to help your plants transplant more easily..

Care

If you would like a larger section of the stem to be blanched, then cover the stems for a couple of weeks before you harvest them. Simply place a barrier around the stem and secure it. Keeping the stems away from sunlight makes them whiter. Newspaper, or toilet rolls work well, but feel free to use whatever you have on hand.

Weed well around your leeks. They don’t like to compete for nutrients and space.

Watering

Leeks don’t like soil that is too dry or too wet, so be sure to only keep the soil moist.

Feeding

Feed your leeks every 4-6 weeks. They like a fair amount of nitrogen, so a nitrogen-rich organic fertilizer or even some manure tea are good options.

Mulching

Mulching leeks helps to keep the soil moist and coil. Apply a generous layer of organic mulch such as lucerne or sugarcane. For young seedlings, a mulch of around 1 cm should be enough, but you can increase the mulch to around 4 cm as they grow. Remember to top up your mulch throughout the growing season, as it does tend to break down.

Harvesting

Harvest: 15 to 18 Weeks After Planting

Use a gardening-fork to gently lift the leeks out of the soil or use a sharp knife to cut the stems off below the soil. Leeks keep well in the soil, so harvest them as needed.

What to do about Snails and slugs?

Lay down grit, like eggshells or silica sand or create barriers around your plants. Remove any slugs or snails that you see.
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