I have been watching Painting the Modern Garden be installed, not an easy process, with more garden benches than usual.   The designer is Robert Carsen, the Canadian opera director, who has also done quite a number of exhibition designs, including L’Impressionisme et la Mode at the Musée d’Orsay and Bohèmes at the Grand Palais.   This morning was the press view when Ann Dumas and Bill Robinson from the Cleveland Museum of Art, the two curators, walked us round and revealed the full glory of the exhibition:  not just Monet himself, as passionate a horticulturalist as he was a painter, settling in Giverny, getting up at 4 in the morning to contemplate his lily pond, but also so many of the other artists of the era, including Sargent, Matisse and Klimt, all of them in different ways fascinated and passionate about the look of flowers and their cultivation.