Asda aims to double its supply of Scottish carrots this year in a bid to remove foreign imports from all stores. The retailer will source 10,000t of carrots from Scotland compared to last year's 5,000t.
Traditionally, it has had to rely on imported produce for up to six weeks in the summer.
In partnership with growers from Angus, Perthshire and Aberdeenshire, Asda has extended the UK growing season from 46 weeks to 50 weeks and is on course to be 100% efficient by 2004.
Asda's produce manager John Shoesmith said: "We have developed a grower partnership that has delivered real benefits."