Some contractors in the east of the country have been advised of a three to four week delay in getting deliveries.
Operators have raised concerns that they don't have enough fuel to last until the end of the month, given that when cultivating, even medium horsepower tractors are using up to 100 litres plus each day.
There are also reports that some farmers have been using red diesel off-farm out of necessity because of poor rural supplies of "standard" diesel.
The Government has warned users that there is no amnesty on its use in non-agricultural vehicles, so getting caught could result in a large fine, plus a calculation of the duty being evaded.
Dairy News - UK diesel supply running dry
Sign up to our newsletter to receive all the latest news and updates.