Rainwater could be collected and used to wash next season's crop of Jersey Royal potatoes.
About 99% of the Jersey Royal crop is exported to mainland Britain
Scottish company A Bartlett and Sons has bought land at Haut Du Mont farm in Trinity and applied for permission to build a water treatment plant.
The environmentally friendly project would involve gathering rainwater from the plant's roofs which would be treated and used to wash the potatoes.
The soil from the potatoes would then go back onto the land.
Ronnie Bartlett, the company's managing director, said rainwater gives the famous potatoes an even better taste.
Fresh and fast
"Jersey's are such a fantastic product and one of the best in the UK, but we've got to make sure we're giving the consumer a better product," he told BBC News.
"Some people in Cornwall might want Cornish and people in Scotland want Ayrshires, but everyone in the UK wants Jerseys.
"By washing and packing the potatoes right there on the island, they're fresher and we can get them to the consumer more quickly."
Mr Bartlett, whose vegetable company is based in Airdrie, is hopeful planners will give their consent in time for next season's crop.
Jersey Royals are the island's highest crop export. The seasonal average for production is about 45,000 tonnes of which 99% is exported to mainland Britain.
At the peak of production in May, up to 1,500 tonnes are exported daily.