Although part of the onion family, leeks dont form bulbs.
Like onions, leeks are cool-season crops which grow best in the temperature range of 13C24C.
In cool and temperate areas, seed is sown from late summer to early autumn.
Seedlings are planted through autumn and winter.
In tropical zones, leeks are a dry-season crop, sown in April.
Transplant seedlings into the vegetable garden when they are large enough to handle (around 12cm high).
Seedlings can be planted during autumn and early winter.
Leek Facts
Common name:LeekBotanical name:Allium ampeloprasumPorrum Group (syn.A.
Just cover the roots so the plants are stable.
As the seedlings grow, earth up soil around the stem.
This blanches the stem so its white or light green in color and tender.
Watering will also wash soil in around the stem.
Leeks grow best in full sun with well-drained soil.
With less light theyll bespindly and may be prone to pests such as aphids.
Water-stressed leeks can bolt to flower.
Leeks are generally trouble-free but may be attacked by onion thrips, which cause white flecking on the leaves.
Diseases are kept in check by removing weeds and maintaining good spacing between plants.
HARVEST AND STORAGE
Where you have leeks in the garden, simply harvest the stems as needed.
Plants are ready to harvest when they are 22.5cm thick or around 12 weeks from transplanting seedlings.
After harvest, wash thoroughly then chop off the roots and tough leaf tops.
Next, wash the stalks clean of soil and theyre ready to chop.
Washing carefully is important as leeks can be gritty if soil has worked its way between the leaf sheaths.
Leeks are usually sliced finely and sauteed before being added to soups, stews or pies.
This slow cooking softens them and helps develop the sweet flavor.
The tougher leaf tops can be added to stocks for an oniony flavor.
Leeks are rich in vitamins A and C.
