Stourgarden has raised more than £11,000 for Cancer Research UK through sales at Tesco.
The sum was grossed through donations from sales of the company’s exclusive Rosanna Pink Onion packs at the UK's largest supermarket.
This is the third year running Stourgarden has made such a donation, totaling over £40,000.
Rosanna Pink Onions were introduced onto Tesco shelves in October 2012, and have since seen a positive increase in sales and demand, according to Stourgarden.
Starting off as a three-in-line pack, increased demand saw the introduction of a 750g pack in 2013, and, latterly, a 1kg pack. Two pence is donated to the charity for every pack of Rosanna Pink Onions sold.
Stourgarden commercial Manager, George Rix, said: “This year’s harvest has seen a 20 per cent increase in Rosanna tonnage giving us the ability to not only sell more, but also achieve a larger donation for 2015/2016 which we hope to exceed £20,000.
"Going forward we hope to offer both a three-in-line, and a 1kg pack on shelves to further appeal to a larger range of consumers. We look forward to continuing our relationship with Tesco and Cancer Research UK for years to come.
"Rosanna - which has a truly unique appearance with layer upon layer of blushing pink colour inside - is exclusively grown and marketed by Stourgarden in the UK, offering UK supply from September till June. Rosanna is revitalising the onion shelves, offering long awaited innovation in a category which has seen little in over 10 years."
Stourgarden is a family-owned specialist onion grower and packer formed in 1995, and based on the Essex/Suffolk border.