The gardens attracted nearly 900,000 visitors during 2009 and plans for the growth and expansion of Longwood Gardens for the next four decades began in 2010 with the hiring of West 8, a Dutch landscape architecture and urban planning firm with headquarters in Rotterdam and an office in New York City.
Near Longwood Gardens, PA 52 splits from US 1 by heading north on Lenape Road.
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Buddleja davidii 'Glokosa' is an obscure American cultivar, not described in contemporary horticultural literature, but listed in the accessions (no. 19970593) of Longwood Gardens Inc., Kennett, Pennsylvania, source: Carolina Nurseries (ceased trading 2010), Charleston, South Carolina.
Also near the byway in the Wilmington area is the Delaware Art Museum, Delaware History Museum, Hagley Museum and Library, and Nemours Mansion and Gardens with the Brandywine River Museum and Longwood Gardens farther north in Pennsylvania.