There's no better way to learn about gardens than to walk through them. Now more than 200 are going public—for a day or two.

The garden stretches across 52 acres and holds ... culture reviews, and videos on Vogue.com.

“They are my laboratory,” she tells Vogue, “it’s where I start all my collections, my colours and palette.” Like Christian Dior, who was influenced by his childhood garden at Villa Les Rhumbs, near ...