- 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







