With only his shovel and a squeegee for company, Tony Ingram cut a lonely figure after hours one night last spring, as he cleared runoff from a torrential rain that had turned a section of the rear entrance of the 1,100-acre Longwood Gardens in Kennett Square, Pa., into a mud flat.
A $250-million makeover of the landmark garden near Wilmington, Del., which will add a conservatory with geothermal and other sustainable systems, is the most ambitious development of a 40-year grand plan.