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Ten years after purchasing Longwood, Pierre du Pont was just getting warmed up. By 1916 he was contemplating grand indoor facilities “designed to exploit the sentiments and ideas associated with plants and flowers in a large way.”

Construction of the Conservatory, 1919

The result was the stunning Conservatory, a perpetual Eden that opened in 1921. The latest technology was used to heat, water, and power the complex, but the systems were hidden in tunnels so as not to detract from the grandeur of the glass-covered peristyle and surrounding rooms.

Pierre chose to fill his new garden not with the usual jungle of exotic tropical foliage as was then the fashion but rather with fruits and flowers used in a decorative, horticultural way. One observer termed his greenhouses “floral sun parlors.”Music Room, 1928


A staff of eight gardeners oversaw this perpetual indoor flower show, aided by three boiler operators. Outdoors there were 11 gardeners and groundskeepers, and the entire Horticultural Department of 29 was headed by old-school English gardener William Mulliss.

Eastern Guernsey Breeder's Association luncheon in Exhibition Hall, 1925It would be hard to imagine a more theatrical setting for the display of plants, unless it would be to the music of a massive, 3,650-pipe Aeolian. In 1923, an elegant Music Room with walnut paneling, damask-covered walls, teak floors, and a molded plaster ceiling was built opening onto the central axis of the main greenhouse.

The public came in droves to see these wonders under glass, fulfilling Pierre’s childhood dream of building a greenhouse open to the public. The du Ponts also had the perfect place for grand entertainment, and they hosted innumerable civic and educational groups as well as family and friends. The guests’ reactions were always the same: a place beyond compare.