Kusum Khandro Ling, Tulku Sang-ngag Rinpoche's retreat center for nuns, was was established in Pharping in 2001. In February of 2002, Rinpoche and Rabjam Rinpoche (of Shechen Monastery, the late H.H. Dilgo Khyentse's seat in Boudanath) formally sealed eight nuns into traditional three-year retreat. They began their time with the practice of lojong for twenty-one days, followed by accumulating ngondro. The nuns are now completing their final ngondro accumulations for guru yoga.
Concurrent with these retreat activities, Khenpo Ngawang Gelek is teaching Longchen Rabjam's Yonten Dzod ("Treasury of Precious Qualities"), as well as lojong. Tulku Sang-ngag and Kyabje Tulku (a student of H.H. Chatral Rinpoche), gave the retreatants practice instructions for both lojong and Longchen Nyingtig ngondro. In retreat, the nuns follow tije^same schedule as the monks, and also study lama dancing.