One of my favourite gardens here - Nymans, in Handcross, a few miles south of Gatwick and featuring gothic ruins, expansive views, woodland, formal gardens, a grove of Davidia involucrata (the Handkerchief Tree), a 100' pergola walkway smothered in Wisteria, the first Heather Garden in the UK, tropical planting, double herbaceous borders, superb salvias, a…