Why Is Geranium Turning Yellow. She said that winter is a special time for plants. Jul 06 2020 Why Are My Geranium Leaves Turning Red.
Root systems rot causing the geraniums to topple over. This is evident when you start seeing brown to black stems and brown leaves falling off the plant. Geraniums thrive in the warmer climates and having a cold snap or frost can damage a geranium if not cared for.
Apr 25 2021 One of the main reasons that geraniums turn yellow is that they have been over fertilized.
A more stable temperature lower air humidity and especially a severe drop in light levels. My guess is too much water--when you say you only water when the soil dries out are you just looking at the surface of the soil. Luckily that same neighbor saved the day. Nutrient deficiencies are often the culprit for yellow leaves on geraniums.