We are a community of Zen students who sit together on a regular basis to support one another in staying awake, moment-by-moment, to see and live our true nature, our at-one-ment with all.  One Heart Sangha exists to support the ongoing meditation practice and compassionate presence of its members. Our lineage is that of the White Plum Asanga which was established by Taizan Maezumi Roshi and draws heavily on the teachings of the Soto School of Zen, founded by Dogen Zenji in the 13th century. We are affiliated with the Zen Peacemakers Sangha, founded by Roshi Bernie Glassman. We are a non-denominational community and welcome everyone.


We offer morning and evening weekly sitting meditation (zazen) practice sessions, monthly all day sitting practice (zazenkai), study groups, and longer residential practice sessions (sesshin). Zen practitioners and beginners welcome - we are a welcoming group!

Spring Sesshin: May 16-19, 2019 in Germantown, MD at Wellspring Retreat Center. See details above. 

Fall Sesshin: September 4-8, 2019 in Germantown, MD at Wellspring Retreat Center


Sensei Bob Jin Gen Ertman

Sensei Bob Jin Gen Ertman

Sensei Bob Jin Gen Ertman is a dharma heir of Rose Mary Myoan Dougherty, Sensei, and a long-time member of the Silver Spring Zendo/One Heart Sangha.  He is currently serving as the guiding teacher for the sangha. He is also a member of the Zen Peacemakers and is grateful for the way it has shaped his practice in all of life. He writes and teaches haiku as a practice of being fully in the present moment. He received the precepts at Boundless Way Zen from James Ford, David Rynick, & Melissa Blacker.  Bob is a retired federal attorney and lives in Annapolis with his wife, Phyllis.  Together they are facilitators of a Mindfulness Practice Group at the Unitarian Universalist Church of Annapolis. In his spare time, Bob collects fossils, with his daughter Hallie when he can (They began when she was 4 - she's 28 now). Sensei Bob also practices at many Zen Peacemakers Bearing Witness retreats, and recently coordinated a Street Retreat in Washington DC in September 2018.


Martine Palmiter, Dharma Holder of Rose Mary Myoan Dougherty, and long-time member of One Heart Sangha. She leads the Tea Ladies, a women’s dharma study group in Rockville, working with The Hidden Lamp: Stories from Twenty-five Centuries of Awakened Women. She has studied yoga for many years, and enjoys cycling, writing, and her garden.

Sensei Rose Mary Myoan (“Subtle Peace”) Dougherty (1939-2019), the sangha's first guiding teacher and founder of One Heart Sangha/Silver Spring Zendo.  She began her Zen studies with Charlotte Joko Beck and is dharma heir of Janet Jinne Richardson Roshi. She completed the End of Life Counseling Program at Metta Institute in California. She is the founder of Companioning the Dying.