1. Pick a sunny and well-drained site for growing onions.
  2. Preparing soil: Before planting, prepare the soil by adding organic matter, such as compost or well-rotted manure, to improve its structure and fertility.
  3. Selecting seeds: Choose seeds from a recommended variety, such as ‘Sturon’, ‘Red Baron’ or ‘Electric’.
  4. Sowing the seeds: Sow the seeds directly into the soil in the early spring, about 1.5cm deep and spaced about 15cm apart.


  1. Watering: Keep the soil evenly moist until the seedlings are established.
  2. Thinning: When the seedlings are large enough to handle, thin them out to approximately 10cm apart.
  3. Fertilizing: Feed the plants with a balanced fertilizer every 4-6 weeks.
  4. Watering: Water the plants regularly, especially during dry periods, to ensure consistent growth.
  5. Topping: To encourage bulb development, “top” the plants by cutting back the green foliage to about 10cm when it starts to yellow.


Harvesting: Harvest the onions when the tops have fallen over and begun to turn yellow, usually in late summer or early autumn.

With proper care and attention, you should be able to harvest a crop of healthy and flavorful onions in approximately 6-7 months.