Based in Forton, Lancashire, the company is home of the Mammoth Onion and was founded in 1860. It celebrates its 150th anniversary this year.
In the 1950s and 1960s, William Martin Robinson, known as Martin, brought the large strains to the forefront of exhibition varieties. He was awarded the RHS's Victoria Medal of Honour in 1979 and was made a fellow of the Institute of Horticulture in 1986.
He was a member of the RHS fruit and vegetable committee and the RHS show schedule committee until 2004 and judged at Chelsea and many other horticulture shows.
Robinson was instrumental in the foundation of the National Vegetable Society and was president for 10 years and northern branch chairman for 20 years. He was secretary of Lancaster branch NFU for many years and was county chairman during the 1960s.
He married Joan in 1942 and they had three daughters, Margaret, Susan and Katherine. He expanded the business until his retirement and staged many gold medal-winning exhibits at shows throughout the country.
Robinson's funeral was held at Forton United Reformed Church on 15 April.