It is currently regarded as a luxury purchase by shoppers, who have been forced to turn to lower cost, intensively-farmed produce by the economic downturn.
But a study suggests that the price of oil could soon make cereal crops grown with fertilisers more expensive than those produced more naturally.
Industrial farming relies on fossil fuels to mine, manufacture and transport fertilisers which replace nutrients in the soil.
Organic farming, however, improves soil fertility through crop rotations and is less affected by oil prices.