The stalks, which are thought to have been grown by farmers on the farmlands of northern NSW, are thought by some to be a legacy of the area’s long history as a farming hub.
One local has even suggested they could have been harvested during a nearby fire, the ABC reports.
The stumps are often seen on fields and in the water, though the ABC points out that the stalks have not been seen since 2009.
One farmer told the ABC that he had not harvested any stalks since the blaze, saying that he was worried about the effect on his crop.
In a statement, the National Farmers Union said it was not possible to remove cannabis stalks from fields and would work with farmers to do so.
The union said the stumps were “not suitable for cultivation”, but would work to ensure farmers would be “not forced to plant the stupest plant on their land”.
The statement added that the union was working with farmers in the area to ensure they could do so and was “committed to continuing to work with them in the future”.