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As part of the Garden Conservancy Open Days Program Digging Deeper series: in 2011, Nancy Gray Pyne hired the New Jersey-based firm, F2 Environmental Design. Andrea Filippone is a boxwood expert who is on a crusade to get people to move beyond the sickly standard English and American box varieties to embrace lesser-known hybrids that are elegant and agreeably pungent, but better garden plants. Eric T. Fleischer is the organic guru in the firm, who believes that the basis of all successful gardening is an understanding and nurturing of the soil biosphere. Registration is $30 for Garden Conservancy members; $35 for nonmembers.