The main difference is the certification standard used to grow the wheat. In addition sustainable wheat flours that are intended for bread-making are required to be fortified with folic acid, a form of vitamin B9, whereas organic flours are not.

Organic Flour is made from wheat grown in accordance with certified organic standards, which prohibit synthetic pesticides, herbicides and fertilisers. Organic farming focuses on soil health, biodiversity and natural farming practices.

Sustainable Flour is made from wheat grown under the Certified Sustainable programme, which independently verifies environmental, social and governance outcomes. This includes farming practices that support soil health, ecosystem regeneration and more responsible resource management. While sustainable farming aims to reduce environmental impact, it does not necessarily meet certified organic standards.

There is also a difference in fortification. In Australia, non-organic wheat flour intended for bread-making is required to be fortified with folic acid, a form of vitamin B9. Organic wheat flour is exempt from this mandatory fortification requirement.