The last of summer horticulture with the Duke of Devonshire

/ As far as country piles go, Chatsworth is as grand as it gets. The garden grounds cover 105 acres seamlessly blended into the surrounding 1,000-acre park along the Derwent River valley in Derbyshire, England. “For a relatively formal garden, especially compared to the French or Italian, I love the wilderness they’ve allowed with wild…