A plant that produces both tomatoes and potatoes, called the TomTato, has been developed for the UK market.
Ipswich-based horticultural firm Thompson and Morgan said the plants were not genetically modified.
Similar plants have been created in the UK, but the firm said it was thought to be the first time they had been produced on a commercial scale.
Guy Barter, of the Royal Horticultural Society (RHS), said it was looking at the plant with "real interest".
Mr Barter said many of these plants - created by a technique known as grafting - had been created before but taste had previously been a problem.
"We're looking at it with real interest because Thompson and Morgan are a really reputable firm with a lot to lose, but I wouldn't rule out that it could be a very valuable plant to them," said Mr Barter, who is a contributor to BBC Gardener's World.
"In the past we've never had any faith in the plants - they've not been very good - but grafting has come on leaps and bounds in recent years.
Grafting is the process of combining two different plants to create a single one.
It requires lots of skill and practice, but has been successfully achieved by providing a clean cut on the two plants and taping the ends together until they heal.
The purpose is to combine one plant's qualities of flowering or fruiting with the roots of another that offers vigour and resilience.
Most plants need to be grafted within their own genus - such as potatoes and tomatoes - but it is sometimes possible to graft those of a differing makeup.
"Many people don't have that much space in their gardens and I imagine this sort of product would appeal to them."