A little worried about my otherwise healthy looking Kalanchoe. One of its leaves started turning yellow at the tip and am worried because a similar thing happened to another leaf, and that one now looks almost dead.
The first image shows the current leaf turning yellow. The second is of the old one which had started turning yellow a few weeks ago. And the third of the plant in general.
I have been watering it roughly every two weeks, waiting for the soil to dry out completely and then watering it pretty generously. Am worried if this is a sign of root rot. I have kept it by the window since the start of winter here in Frankfurt.
Directions would be appreciated. Thanks!