This guide provides information for good nutrient management of Australian onion crops.

It was developed by the Australian Onion Industry Communications and Extension Program (VN21000) and is designed for onion growers and crop advisors who aim to produce high-quality crops without wasting nutrients. It covers: 

  • An overview of onion growth and nutrient needs 
  • Information on onion root growth and development 
  • An overview of nutrient needs of onion crops 
  • An approach to nutrient budgeting, determining nutrient needs and nutrition strategies for onions 
  • An overview of key soil factors affecting nutrient availability and uptake, especially pH 
  • Information on key nutrients and use for onion crops 
  • An introduction to crop nutrition monitoring 
  • Information on how nutrients get from the soil into the plant and nutrient interactions 
  • Information on fertiliser nutrient composition and concentration 
  • Information on nutrient stewardship.

Explore the Soil Wealth ICP vegetable crop nutrition guides