Growing Onions

Latest Update 11th June 2018.

  • In February each year, onion seeds are multi-sown 4-6 in each module in a seedling tray in my Eco-Propagator, and each module is transplanted into an Ecobed in April.
  • Onions are a useful addition to our diet used with garlic in vegetable based soups and casseroles.  We like them when used with organic sage and breadcrumbs to make a tasty stuffing for poultry dishes, and we love their sweetness when used in combination with suitable vegetables roasted with beef, lamb or pork.
  • Black aphids are the main pests attacking alliums in our garden.  They appear as soon as the weather starts to warm in late winter/early spring.
  • Onions keep well for up to 9 months if dried and hung in bunches in a dry place in low light. 
  • Variety:                                                    Australian Brown.
  • Family group:                                           Allioideae.
  • Crop rotation group:                                   Light feeders.
  • Garden bed type:                                      Garden Ecobed.
  • Recommended soil pH:                             5.5 - 6.5.
  • Minimum sun per day:                               4 hours.
  • Plant spacings:  (centres x rows).                      100 x 150mm.
  • Weeks to harvest:                                     25 - 30 weeks.
  • Good companions:                                    Carrot, chamomile. lettuce. tomato. brassica. leek.
  • Poor companions.                                      Pea. asparagas.
  • Climate:                                                    Warm temperate.
  • Geography:                                               Southern hemisphere. 
  • This food is very low in Saturated Fat, Cholesterol and Sodium. 
  • It is a good source of Dietary Fibre, Vitamin B6, Folate, Potassium and Manganese, and a very good source of Vitamin C. 
  • More from nutrition
Maintaining Ecobed Productivity. 

  • Check out my blogpage which explains how I maintain productivity in my Ecobeds.  It describes how soil is prepared prior to planting, the importance of rainwater in Ecobeds, how to regulate the sun's intensity and how to feed plants through their leaves.
Propagating Seedlings. 

  • Check out my blogpage which explains how I propagate seeds.
Propagation Plan.

  • Check out my blogpage which tells you when to sow seeds.
Growing Instructions.
  • Sow 4 or 5 onion seeds in each module of a 30 module propagating tray in an EcoPropagator. When about 100mm tall, plant these clusters of seedlings at 100 mm centres along rows 150mm apart.
  • Make a hole for each cluster about 50 mm deep with a 50mm thick dibber and place it in the hole so that about 20mm of the stem is below the surface.  Backfill with soil and water the seedlings in with a seaweed extract in rainwater solution (use suppliers dilution rate). 
  • Cover the soil with fresh mulch as soon as the onions are established.
Harvesting and Storage
  • Harvest the onions when the tops start to dry and fall over. 
  • Pull them out of the ground and rinse off the soil with water.  Leave them to dry in the sun for a few hours.
  • String the onions together in large bunches using the dried stalks and some twine to tie them together.
  • Hang them in a cool, dry airy place until ready for use.
Organic Pest Control. 
  • Onions, like most vegetables, are vulnerable to attack from certain pests in my garden.  My blog on "Controlling Garden Pests" explains a little about these pests and what to do to protect plants from them.  For details click on the appropriate link below.
  • Aphids (blackfly).
  • Slugs and snails.