Linseed oil is the product of a winter growing oilseed plant. The plant is the same as that used in linen production. In northern NSW the crop is grown in rotation with wheat. A small caterpillar known as "heliothus" is particularly damaging and destroys the ripening seed heads.

Crops must be sprayed with an insecticide in spring. Linseed is a dicotyle donous plant as are most weeds that grow in winter. It is very difficult to spray a dicotyledonous plant with a herbicide without damaging the linseed plant.

Yields of linseed is about half that of wheat in the same season and is generally, grown when there are expectations of a favourable market for linseed.