The presentation was made by Andy McIndoe at the National Plant Show, Stoneleigh.
A big supplier to Tesco is BPOA member Neame Lea Nurseries.
Tesco said: "British growers are the lifeblood of the UK horticultural industry and we are very proud of the quality, service and value that our growers deliver. It is hugely important that we support our British growers, in order that they are able to continue to invest and grow.
"In turn this enables us to deliver such fantastic quality plants to our customers whilst being close enough to the range to have insight into future developments, ideas and trends."
Richard Priestley of Neame Lea Nurseries said the success this season was due to the hard work of their own staff and the commitment of Tesco and their plants buying manager, Harriet Turnbull, in promoting and merchandising UK grown bedding.
The Home Grown Users Group was created in January 2014 to represent and promote British-grown product.
#Darby Nursery Stock's Salvia 'Blue Marvel' won best plant at the show, while visitors to the show voted Clematis Nubia Evipo59, also from Darby Nursery Stock and bred by Guernsey Clematis as best in show at the New Plant Awards.