Along with sculptures, the exhibition will also feature drawings and prints.
In March, one of Moore’s artworks – King and Queen – sold for £26m.
Sebastiano Barassi, head of Henry Moore collections and programmes, said: “Moore’s deep affinity with the natural world makes Kew and Wakehurst ideal settings for his work.
“Throughout his career, he was inspired by organic forms – bones, stones, trees, and the rhythms of the landscape – and he believed that sculpture should exist in harmony with its surroundings.”