PHS president Matt Rader said the 2020 Flower Show's theme, Riviera Holiday, will honor Princess Grace's passion for horticulture.
Grace's nephew, John B. Kelly III, said the show's a great opportunity for Monaco.
"The ambassador is going to be funding one of the exhibits and be showcasing Monaco there, and on the environmental side, the Prince Albert Foundation will be funding the environmental summit," he said.
In addition to horticultural eye candy, Kelly said, "I believe they're gonna have a replica of Grace's wedding dress. While I'm not a big fashion person, I'm amazed by how people get so excited by it."
The Flower Show runs from Feb. 29 through March 8.