The tunnels, built over the winter, are now full with newly-potted crops ready for the coming season.
The last two years has seen the completion of development work with the building of a 5,000 sqm glasshouse in the summer of 2015 and the construction of 5,000 sqm of polytunnels in early 2016.
The total growing space at the site now covers just under 6 hectares.
The new tunnels at Bransford, which recently took silver at the International Grower of the Year Awards following its win in the 2016 Grower of the Year Awards, will allow production staff the increased ability to control individual growing environments of specific crops leading to further increases in the quality standards of its plants.
Managing director Geoff Caesar said: "This has been an exciting development phase for the business and has resulted in a significant increase in production area, but also the facilities we are now building are ideally suited to the plants we are growing."