The company has produced a five-point guide to help customers get the best fresh produce out of a garden and has published details on its website on how to best seed, plant and grow various fruits and vegetables.
Managing director Adrian Nind said: "This is the modern-day version of the Dig for Victory campaign (during World War Two).
"We can even advise people about how to grow vegetables at home if they don't have a garden.
"There is a variety of healthy produce that can be grown in pots by a window or even under the stairs."
He said there had been an "explosion" of health television programmes for children including LazyTown and Yo Gabba Gabba.
The aim now was to encourage parents and grandparents to share in children's education by helping them learn through practice how to grow fruit and vegetables.
Nind added: "Growing fruit and vegetables as part of a family objective is the perfect way to bring everyone together.
"It is an opportunity to share experiences, spend time as a family unit and educate younger members of the family."