My plant died. Very seldom is the answer easy.
Plants are complex organisms.
Most importantly, the air and soils in Nevada are dry and without irrigation, most landscape and garden plants do not survive. To complicate matters, plant diseases and insects abound. Sometimes the most trivial condition triggers a chain of events that leads to the death of a plant over time. For example, bark damage from a mower or string trimmer allows a disease organism to enter and eventually kill trees. Dr. Tom Cook, a plantsman with years of experience learning about stress to plants that leads to their death, developed the Death Spiral of Plants.