This paper illustrates the concept of dendrel (rten ‘brel) in Tibetan ecological thought, broadly construed. It will focus on the role of dendrel in native astrology and geomancy. I will argue that dendrel is understood as a bridge between objects and consciousness, and facilitates mind-matter mutual influence and transformation. The paper also explores how a sense of dendrel is deliberately cultivated for worldly purposes by applying a “substance” said to be derived from the “secret bodies” of holy mountains and rivers. Finally, I investigate instances where human consciousness seems to change physical objects or nature itself, particularly through the dendrel-connected Buddhist concepts of “the force of merit” and “waves of blessing”. I draw on both Indian Buddhist writings and their adaptation in Tibetan folk texts on astrology and geomancy.