Why Do Geraniums Turn Yellow. A more stable temperature lower air humidity and especially a severe drop in light levels. Besides the bad look if you dont remove the affected leaves in some cases the condition might spread to other leaves as well.
Apr 07 2017 Lack of light. A more stable temperature lower air humidity and especially a severe drop in light levels. Gradually the lower leaves turn yellow and dry the stem is drawn out geranium is very rare and blooms little.
Essentially when the plant is first brought indoors it has to adapt to vastly different growing conditions.
Generally on over-watered plants the bottom portions of geraniums have yellow leaves. May 26 2020 One of the most common causes for yellowing leaves is too much moisture or overwatering. This is evident when you start seeing brown to black stems and brown leaves falling off the plant. If its just a few leaves and the rest of the plant is looking robust then it could be due to a sudden change in temperature.