Diana set up Salamander cookshop at Sherborne in Dorset with her husband Michael Griffiths in 1993.
Michael said: “Her flair and ability to choose the right products for customers proved to be the bedrock of the business for 25 years, and her philosophy continues today.
“Diana also embraced online shopping with our pioneering website which was years ahead of the bigger retailers.
“Always fair, she set very high standards with her treatment of staff and customers alike, and her approach to ethical trading.
“Diana is sorely missed by me, her daughter Anna and her son James, to whom she was a wonderful wife and mother, balancing the demands of the business with the love and care needed by a growing family.”