The APVA has uncovered under 2 feet of dirt the site of the original 1600s garden, made like the English gardens of the day, showing the wealth of the owner of the house, Arthur Allen. The garden plaque reads:

This garden is a reconstruction of a seventeenth century garden located on this site. The present garden mirrors as closely as possible its historical counterpart constructed between 1680 and 1690. The beds, walks, and locations of structures are based on evidence revealed through extensive archaeological investigation. The garden is arranged in a formal manner with a grid of six central planting beds (A) enclosed by tamped sand walkways. Also present are starting beds (B), which are warmed and protected by the forcing wall (C), defining the northern edge of the garden. Cold frames (D) are located within the starting beds to provide additional protection for tender plants and to extend the growing season. Surrounding the garden on three sides are border beds (E), which typically contained perennial plants, including small fruits, herbs, and ornamentals.

Archaeology uncovered the evidence of structures (F) at the ends of the crosswalks, at least one of which may have been a garden service building (G). Because no evidence of a seventeenth-century fence was discovered, it is believed that the remaining three sides of the garden were enclosed by a Hedge (H).