The Leek is a delicious vegetable that grows in winter. Although it grows easily, it requires your attention. You can sow it in a seedbed or a container. However, you can transplant it to its final location after some time.  

The sowing time for the vegetable is in spring, and the harvesting time starts in autumn and ends in late winter if you are fortunate to be able to harvest them so late.  

Sowing Leeks

For sowing the seeds, you first have to prepare the growing site. For this purpose, you can add well-rotted manure or garden compost in autumn. It would be great if you sow them in open ground. However, you can also grow the leaks in raised beds and large deep containers.

The traditional way to sow leaks is in seedbeds away from the vegetable garden. However, you can transplant these leeks in early summer. You might be wondering why you should follow this path.

Well, it would take a lot of space to sow the seeds in the vegetable garden, especially if you have other fast-growing crops like lettuces.   

Sowing in indoor modules is a good option if you want to sow only a few leeks or don’t have enough space outdoors. However, you can transplant these modules outdoors when they are grown.

The best time to sow the seeds starts in March and ends in April. Sow the seeds thinly in a depth of 0.5 inches. Moreover, ensure that rows are spaced 6 inches apart.

Growing Leeks

Keep drawing up the dry soil around plants in their growing stages. It will help to increase the white stem length. However, you must ensure that the soil doesn’t fall between the leaves. Water the plants regularly during the long dry spells.

Harvesting Leeks

  • You must harvest these vegetables in late summer when they are still young. It will elongate the cropping period.  
  • Use a fork to lift them gently from the soil taking care not to damage them.

Common problems

Leek rust

Leek rust is a fungal disease. It results in the appearance of bright yellow spots on the leaves. Long, wet spells can even worsen this situation.   


Mild rust attacks do not affect plants. However, it results in leave shrivelling which ultimately leads to lower yield. You can’t control it once it attacks the crop. However, you can take the following precautions to prevent it:

  • Don’t overcrowd the plants. It will increase the humidity leading to higher infection chances.
  • Remove the infected plant parts
  • Never grow leeks, garlic, or onion on the same spot for three consecutive years.

Onion white rot

It is a fungus born in soil. It has several effects on plants. For instance, it cause

  • Yellowing of foliage
  • Wilting of foliage
  • Rot the roots
  • Damage the bulb under the soil

It appears as fluffy white fungus on the bulb base, which later develops into round black structures.  


Onion white rot can’t be cured chemically. The best tip to avoid white rot is to prevent the transportation of cloves in contaminated soil. Moreover, you have to take special care where cross-contamination is frequent.   

Leek moth

It is a new pest of onions and leeks. It mostly invades the crops in the South-east coast of the UK. Moreover, it is also a common pest in the north and inland.  

The Leek moth invades the leaves and results in the appearance of whitish-brown patches on them. However, severe infection turns the leaves yellow and rots them.


It is not possible to control it once it attacks the plant. However, here’re some preventive measures that can help you to prevent them:

  • Remove the damaged parts of the plants
  • Cover the plants with fleece. It will not allow the adult moths to lay eggs on the leaves.

Here are 45 recipes using leeks from Delicious Magazine

Take a look at the different varieties of leek that are available below

For more information or assistance with this article, or if you want to add something that you feel is relevant, we would love to hear from you via the Contact Us page.

07/11/2021 | Vegetables | 0 Comments

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