The garden will be on display at the show between May 21-25 before relocating to a permanent site in Normandy in time for the D-Day anniversary on June 6.
This year is particularly poignant as it will be the final year the charity behind the garden, D-Day Revisited, will send veterans on a pilgrimage to Normandy.
Ben Smith from Pierce said: “John is a really talented gardener and as soon as we heard about his latest project, we knew we wanted to get involved. We’re really proud that our donation will go towards supporting a local business creating a lasting tribute to the D-Day veterans.
“We can’t wait to see the finalised garden and the reactions of the veterans and the Royal family towards this tribute.”