• Garden Writer’s Association of America, Gold Medal for best writing, 2010, for Home Outside
  • Thomas College, Honorary Doctorate of Humane Letters, 2010
  • Massachusetts Horticultural Society, Gold Medal for Weezie’s Garden, 2008
  • Honor Award from Prairie Gateway Chapter of ASLA for the East Gate Project, 2008
  • University of Massachusetts, Dartmouth, Honorary Doctorate of Fine Arts, 2007
  • Association for Professional Landscape Designers, 2006, Award of Distinction
  • American Horticultural Society, 2005, Great American Gardeners Award for Landscape Design
  • Boston Parent’s Paper Award, Best Children’s Outdoor Play Area, 2005, for Weezie’s Garden
  • City of Toronto, 2005, Leonardo Da Vinci Award for Toronto Music Garden
  • American Horticultural Society, 2005, Great American Gardeners Award for Landscape Design
  • Garden Writer’s Association of America, Gold Medal, 1996, for The Inward Garden
  • The New York Times, 1990, named Contemplative Gardens “one of the ten best garden books of the year”
  • Massachusetts Horticultural Society, Gold Medal, Isabella Stewart Gardner Museum Exhibit, New England Spring Flower Show
  • Massachusetts Horticultural Society, Silver Medal, Isabella Stewart Gardner Museum Exhibit, New England Spring Flower Show
  • New York Horticultural Society, Medal of Honor, Isabella Stewart Gardner Museum Exhibit, New England Spring Flower Show