The couple’s children, Lucie Kitchener and Giles Martin, said the garden was a project their mother was passionately involved with.
They said the garden at Strawberry Field would add “another dimension to an already magical place” .
Ms Kitchener added: “We are honoured that the garden will now pay tribute to both our parents and we are so grateful to those who have made it possible.”
Strawberry Field, in Woolton, is owned and operated by The Salvation Army at the site which inspired John Lennon to write the song of the same name.
The rose garden is scheduled to open in early 2026.