Mar 21, 2018 - 12:44 PM
Not enough water or too much water. Because they need regular, even amounts of water, dry spells can cause plumeria leaves to turn yellow and cause them to drop off the plant, with the bottom leaves suffering first. If you see yellowing leaves, check the soil by digging down several inches making sure it isn't wet. Plumeria love water, but they do not like their feet to be wet for any length of time.