Longwood Gardens to expand and transform its renowned conservatory grounds Interior View, West Conservatory Longwood Reimagined: A New Garden Experience. Courtesy of WEISS/MANFREDI with Reed Hilderbrand for Longwood Gardens. KENNETT SQUARE, PA .-Longwood Gardens today unveiled plans for a sweeping yet deeply sensitive transformation of its core area of conservatory gardens, in the most ambitious revitalization in a century of Americas greatest center for horticultural display. Adding new plantings and buildings across 17 acres, Longwood Reimagined: A New Garden Experience will expand the public spaces of the renowned central grounds and connect them from east to west, offering a newly unified but continually varied journey from lush formal gardens to views over the open meadows of Pennsylvanias Brandywine Valley.