The Duchess, who was most recently pictured attending a Remembrance Sunday service at the Cenotaph in central London, is said to be planning to launch her venture within the next two years.
If the rumours are true, Kate will be following in the footsteps of her father-in-law Charles, whose Duchy range has more than 200 products stocked in Waitrose, from jam to cider.
A source told the Mail Online: 'It's a concept for now but it will happen – just give it 18 months or so.'
'And it's natural that it should do so. One day Prince William will want to have a profitable business attached to his estate to generate funds – both charitable and otherwise – just like his father does.
'It's also important for William to promote his home, Norfolk, in the same way that Charles promotes Cornwall with the Duchy range,' the source added. 'You can just imagine the labelling – 'home-grown organic produce from Norfolk, home of Prince William'.'
Kate at Sunday's Remembrance Day service with Sir Tim Laurence, Queen Maxima and Sophie Countess of Wessex. Princes William and Harry were also in attendance.
The idea is said to have stemmed from Kate's love of growing organic vegetables at the family's Norfolk estate, Anmer Hall, which will likely reflect in the name of the products. It's previously been reported that the 33 year old feeds her children, George, two and Charlotte, six months, only the best organic food, prepared from scratch in her kitchen.
The interest in health food runs in the Middleton side of the family too, with the Duchess' sister Pippa currently training to become a nutritionist.
Kate and husband William are both held in high regard for their charity work, and it is thought that the majority of the funds from the project will be donated to worthy causes.
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