“Japanese Garden Elements.”
Morris Arboretum, frequent lecturer 1999-2010.

“Japanese Gardens.”
Pennsylvania Horticultural Society, 1996.

“The Zen Garden: Design and Construction.”
Haverford College, 1993.

“The Chinese Garden.”
Univ. of Pennsylvania, 1992.

“Japanese Gardens and Chinese Origins.”
Univ. of Pennsylvania, 1992.

“Japanese Gardens and Architecture: Continuity and Contrast.”
New York Botanical Garden symposia speaker: “The Japanese Garden in America” at National Wildlife Federation, DC; NYBG, NY; and Harvard Univ., MA., 1990.

“Japanese Gardens : The Heian Period to the Present.”
Arboretum of the Barnes Foundation, 1989.

“Chinese and Japanese Gardens: Continuity and Contrast."
International Bonsai Congress, San Antonio, TX, 1988.

“Pines: The Essence of Japanese Gardens.”
International Bonsai Symposium, Rochester, NY, 1983.

“Japanese Gardens: Past and Future.”
Cornell Univ., Mt. Holyoke College, 1981.