Onions – Bunching

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Optimum Soil Temperature
Days to Germination
Days to Harvest
Direct Sow or Transplant
Distance Apart
Soil pH
Annual/Biennial /Perennial 



Storing harvested [name]:Seed Saving:



Fun Facts


Downy Mildew – Grey or purple spots on leaves. Leaves appear pitted. Usually occurs in wet weather. Improve air circulation and drainage.Heavy top growth/Leaf droop – Too much Nitrogen or manure.

Soft Bulbs – Excess Nitrogen

Onions do not store well – Excessive moisture. Plant long keeping varieties such as Pukekohe Long Keeper. Ensure plants are dried before storage.

Thick necks in mature onions – excess Nitrogen. Planted too deep. Transplanted too late. Dry soil early in growth period. Plant out before seedling exceeds 6mm in width.

Botrytis, grey mould – soft roots with grey or brown mould – more common in storage) Store in dry well ventilated conditions.

Bulbs split at base – heavy rain or watering after a prolonged dry spell. Water frequently in dry weather.

Bolting/Running to seed – seed sown at the wrong time. Sow correct variety at the correct time.


Thrips – blotched silver, grey or white. Leaves may deform in severe cases. More common in dry weather. Keep garden weeded. Keep plants well watered

Companion Planting

Beets, Cabbages, Carrots, Leeks, Lettuce, Marjoram, Parsley, Parsnip, Roses, Silverbeet, Strawberries, TomatoesNEVER Beans, Broad Beans, Bush Beans, Climbing Beans,