Description: Signs of root rot in Plumeria plants include wilting, yellowing leaves, and the presence of dark, foul-smelling roots. Causes: Root rot is often caused by overwatering or waterlogged soil, leading to oxygen deprivation and the growth of rot-causing pathogens. Solutions: Wilting and yellowing of leaves: If the plant shows signs of wilting or yellowing, it may indicate root damage. Gently remove the plant from the soil and inspect the roots. Foul-smelling dark roots: Root rot can cause roots to become dark, mushy, and emit a foul odor. Proper drainage and watering: Ensure the soil has good drainage to prevent waterlogging. Water the plant moderately and avoid overwatering. Replace the soil: If root rot is identified, remove the affected plant, and replace the soil with fresh and well-draining substrate. Improve aeration: Enhance the aeration of the root zone by using a well-aerated potting mix and avoiding compacted soil.